1
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Guo RJ, Wang SY, Liu C, Bark RA, Meng J, Zhang SQ, Qi B, Rohilla A, Li ZH, Hua H, Chen QB, Jia H, Lu X, Wang S, Sun DP, Han XC, Xu WZ, Wang EH, Bai HF, Li M, Jones P, Sharpey-Schafer JF, Wiedeking M, Shirinda O, Brits CP, Malatji KL, Dinoko T, Ndayishimye J, Mthembu S, Jongile S, Sowazi K, Kutlwano S, Bucher TD, Roux DG, Netshiya AA, Mdletshe L, Noncolela S, Mtshali W. Evidence for Chiral Wobbler in Nuclei. PHYSICAL REVIEW LETTERS 2024; 132:092501. [PMID: 38489643 DOI: 10.1103/physrevlett.132.092501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Accepted: 01/30/2024] [Indexed: 03/17/2024]
Abstract
Three ΔI=1 bands with the πg_{9/2}⊗νg_{9/2} configuration have been identified in _{35}^{74}Br_{39}. Angular distribution, linear polarization, and lifetime measurements were performed to determine the multipolarity, type, mixing ratio, and absolute transition probability of the transitions. By comparing these experimental observations with the corresponding fingerprints and the quantum particle rotor model calculations, the second and third lowest bands are, respectively, suggested as the chiral partner and one-phonon wobbling excitation built on the yrast band. The evidence indicates the first chiral wobbler in nuclei.
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Affiliation(s)
- R J Guo
- Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Institute of Space Sciences, Shandong University, Weihai 264209, People's Republic of China
| | - S Y Wang
- Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Institute of Space Sciences, Shandong University, Weihai 264209, People's Republic of China
| | - C Liu
- Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Institute of Space Sciences, Shandong University, Weihai 264209, People's Republic of China
| | - R A Bark
- iThemba LABS, 7129 Somerset West, South Africa
| | - J Meng
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, People's Republic of China
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, People's Republic of China
- Department of Physics, University of Stellenbosch, Matieland 7602, South Africa
| | - S Q Zhang
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, People's Republic of China
| | - B Qi
- Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Institute of Space Sciences, Shandong University, Weihai 264209, People's Republic of China
| | - A Rohilla
- Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Institute of Space Sciences, Shandong University, Weihai 264209, People's Republic of China
| | - Z H Li
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, People's Republic of China
| | - H Hua
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, People's Republic of China
| | - Q B Chen
- Department of Physics, East China Normal University, Shanghai 200241, People's Republic of China
| | - H Jia
- Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Institute of Space Sciences, Shandong University, Weihai 264209, People's Republic of China
| | - X Lu
- Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Institute of Space Sciences, Shandong University, Weihai 264209, People's Republic of China
| | - S Wang
- Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Institute of Space Sciences, Shandong University, Weihai 264209, People's Republic of China
| | - D P Sun
- Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Institute of Space Sciences, Shandong University, Weihai 264209, People's Republic of China
| | - X C Han
- Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Institute of Space Sciences, Shandong University, Weihai 264209, People's Republic of China
| | - W Z Xu
- Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Institute of Space Sciences, Shandong University, Weihai 264209, People's Republic of China
| | - E H Wang
- Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Institute of Space Sciences, Shandong University, Weihai 264209, People's Republic of China
| | - H F Bai
- Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Institute of Space Sciences, Shandong University, Weihai 264209, People's Republic of China
| | - M Li
- Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Institute of Space Sciences, Shandong University, Weihai 264209, People's Republic of China
| | - P Jones
- iThemba LABS, 7129 Somerset West, South Africa
| | - J F Sharpey-Schafer
- iThemba LABS, 7129 Somerset West, South Africa
- Department of Physics, University of the Western Cape, P/B X17 Bellville 7535, South Africa
| | - M Wiedeking
- iThemba LABS, 7129 Somerset West, South Africa
- School of Physics, University of the Witwatersrand, Johannesburg 2050, South Africa
| | - O Shirinda
- iThemba LABS, 7129 Somerset West, South Africa
- Department of Physics, University of Stellenbosch, Matieland 7602, South Africa
- Department of Physical and Earth Sciences, Sol Plaatje University, Private Bag X5008, Kimberley 8301, South Africa
| | - C P Brits
- iThemba LABS, 7129 Somerset West, South Africa
- Department of Physics, University of Stellenbosch, Matieland 7602, South Africa
| | - K L Malatji
- iThemba LABS, 7129 Somerset West, South Africa
- Department of Physics, University of Stellenbosch, Matieland 7602, South Africa
| | - T Dinoko
- iThemba LABS, 7129 Somerset West, South Africa
| | | | - S Mthembu
- iThemba LABS, 7129 Somerset West, South Africa
- Department of Physics, University of Zululand, Private Bag X1001, KwaDlangezwa 3886, South Africa
| | - S Jongile
- iThemba LABS, 7129 Somerset West, South Africa
- Department of Physics, University of Stellenbosch, Matieland 7602, South Africa
| | - K Sowazi
- iThemba LABS, 7129 Somerset West, South Africa
- Department of Physics, University of the Western Cape, P/B X17 Bellville 7535, South Africa
| | - S Kutlwano
- iThemba LABS, 7129 Somerset West, South Africa
| | - T D Bucher
- iThemba LABS, 7129 Somerset West, South Africa
- Department of Physics, University of Stellenbosch, Matieland 7602, South Africa
| | - D G Roux
- Department of Physics and Electronics, Rhodes University, Grahamstown 6410, South Africa
| | - A A Netshiya
- iThemba LABS, 7129 Somerset West, South Africa
- Department of Physics, University of the Western Cape, P/B X17 Bellville 7535, South Africa
| | - L Mdletshe
- iThemba LABS, 7129 Somerset West, South Africa
- Department of Physics, University of Zululand, Private Bag X1001, KwaDlangezwa 3886, South Africa
| | - S Noncolela
- Department of Physics, University of the Western Cape, P/B X17 Bellville 7535, South Africa
| | - W Mtshali
- Department of Physics, University of Zululand, Private Bag X1001, KwaDlangezwa 3886, South Africa
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2
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Yavahchova M, Tonev D, Goutev N, de Angelis G, Bhowmik R, Singh R, Muralithar S, Madhavan N, Kumar R, Kumar Raju M, Kaur J, Mahanto G, Singh A, Kaur N, Garg R, Sukla A. Examples of dynamic chirality in nuclei. EPJ WEB OF CONFERENCES 2018. [DOI: 10.1051/epjconf/201819405003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
In many cases the chirality was almost observed but the transition probabilities are different. This fact is clearly seen in the cases of 134Pr and 102Rh. In the case of chirality, the yrast and the side bands should be nearly degenerate. In the angular momentum region where chirality sets, the B(E2) values of the electromagnetic transitions deexciting analog states of the chiral twin bands should be almost equal. Correspondingly the B(M1) values should exhibit staggering. Our lifetime measurements in the cases of 134Pr and 102Rh and the theoretical analysis do not support static chirality. Chirality has mainly a dynamical character in both nuclei. In the present paper, we compare our results with the results for other chiral candidate nuclei, which fulfill static chirality conditions.
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3
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Lu BN, Zhao J, Zhao EG, Zhou SG. Fission barriers from multidimensionally-constrained covariant density functional theories. EPJ WEB OF CONFERENCES 2017. [DOI: 10.1051/epjconf/201716300034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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4
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Liu C, Wang SY, Bark RA, Zhang SQ, Meng J, Qi B, Jones P, Wyngaardt SM, Zhao J, Xu C, Zhou SG, Wang S, Sun DP, Liu L, Li ZQ, Zhang NB, Jia H, Li XQ, Hua H, Chen QB, Xiao ZG, Li HJ, Zhu LH, Bucher TD, Dinoko T, Easton J, Juhász K, Kamblawe A, Khaleel E, Khumalo N, Lawrie EA, Lawrie JJ, Majola SNT, Mullins SM, Murray S, Ndayishimye J, Negi D, Noncolela SP, Ntshangase SS, Nyakó BM, Orce JN, Papka P, Sharpey-Schafer JF, Shirinda O, Sithole P, Stankiewicz MA, Wiedeking M. Evidence for Octupole Correlations in Multiple Chiral Doublet Bands. PHYSICAL REVIEW LETTERS 2016; 116:112501. [PMID: 27035296 DOI: 10.1103/physrevlett.116.112501] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Indexed: 06/05/2023]
Abstract
Two pairs of positive-and negative-parity doublet bands together with eight strong electric dipole transitions linking their yrast positive- and negative-parity bands have been identified in ^{78}Br. They are interpreted as multiple chiral doublet bands with octupole correlations, which is supported by the microscopic multidimensionally-constrained covariant density functional theory and triaxial particle rotor model calculations. This observation reports the first example of chiral geometry in octupole soft nuclei.
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Affiliation(s)
- C Liu
- Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai 264209, People's Republic of China
| | - S Y Wang
- Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai 264209, People's Republic of China
| | - R A Bark
- iThemba LABS, 7129 Somerset West, South Africa
| | - S Q Zhang
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, People's Republic of China
| | - J Meng
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, People's Republic of China
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, People's Republic of China
- Department of Physics, University of Stellenbosch, Matieland 7602, South Africa
| | - B Qi
- Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai 264209, People's Republic of China
| | - P Jones
- iThemba LABS, 7129 Somerset West, South Africa
| | - S M Wyngaardt
- Department of Physics, University of Stellenbosch, Matieland 7602, South Africa
| | - J Zhao
- Key Laboratory of Frontiers in Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
- Physics Department, Faculty of Science, University of Zagreb, Bijenicka 32, Zagreb 10000, Croatia
| | - C Xu
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, People's Republic of China
| | - S-G Zhou
- Key Laboratory of Frontiers in Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | - S Wang
- Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai 264209, People's Republic of China
| | - D P Sun
- Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai 264209, People's Republic of China
| | - L Liu
- Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai 264209, People's Republic of China
| | - Z Q Li
- Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai 264209, People's Republic of China
| | - N B Zhang
- Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai 264209, People's Republic of China
| | - H Jia
- Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai 264209, People's Republic of China
| | - X Q Li
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, People's Republic of China
| | - H Hua
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, People's Republic of China
| | - Q B Chen
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, People's Republic of China
| | - Z G Xiao
- Department of Physics, Tsinghua University, Beijing 100084, People's Republic of China
- Collaborative Innovation Center of Quantum Matter, Beijing 100084, People's Republic of China
| | - H J Li
- Department of Physics, Tsinghua University, Beijing 100084, People's Republic of China
| | - L H Zhu
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, People's Republic of China
| | - T D Bucher
- iThemba LABS, 7129 Somerset West, South Africa
- Department of Physics, University of Stellenbosch, Matieland 7602, South Africa
| | - T Dinoko
- iThemba LABS, 7129 Somerset West, South Africa
- Department of Physics, University of the Western Cape, P/B X17 Bellville 7535, South Africa
| | - J Easton
- iThemba LABS, 7129 Somerset West, South Africa
- Department of Physics, University of the Western Cape, P/B X17 Bellville 7535, South Africa
| | - K Juhász
- Department of Information Technology, University of Debrecen, H-4010 Debrecen, Hungary
| | - A Kamblawe
- iThemba LABS, 7129 Somerset West, South Africa
- Department of Physics, University of Stellenbosch, Matieland 7602, South Africa
| | - E Khaleel
- iThemba LABS, 7129 Somerset West, South Africa
- Department of Physics, University of Stellenbosch, Matieland 7602, South Africa
| | - N Khumalo
- iThemba LABS, 7129 Somerset West, South Africa
- Department of Physics, University of the Western Cape, P/B X17 Bellville 7535, South Africa
- Department of Physics, University of Zululand, Private Bag X1001, KwaDlangezwa 3886, South Africa
| | - E A Lawrie
- iThemba LABS, 7129 Somerset West, South Africa
| | - J J Lawrie
- iThemba LABS, 7129 Somerset West, South Africa
| | - S N T Majola
- iThemba LABS, 7129 Somerset West, South Africa
- Department of Physics, University of Cape Town, Rondebosch 7700, South Africa
| | - S M Mullins
- iThemba LABS, 7129 Somerset West, South Africa
| | - S Murray
- iThemba LABS, 7129 Somerset West, South Africa
| | - J Ndayishimye
- iThemba LABS, 7129 Somerset West, South Africa
- Department of Physics, University of Stellenbosch, Matieland 7602, South Africa
| | - D Negi
- iThemba LABS, 7129 Somerset West, South Africa
| | - S P Noncolela
- iThemba LABS, 7129 Somerset West, South Africa
- Department of Physics, University of the Western Cape, P/B X17 Bellville 7535, South Africa
| | - S S Ntshangase
- Department of Physics, University of Zululand, Private Bag X1001, KwaDlangezwa 3886, South Africa
| | - B M Nyakó
- Institute of Nuclear Research of the Hungarian Academy of Sciences (ATOMKI), H-4001 Debrecen, P.O. Box: 51, Hungary
| | - J N Orce
- Department of Physics, University of the Western Cape, P/B X17 Bellville 7535, South Africa
| | - P Papka
- iThemba LABS, 7129 Somerset West, South Africa
- Department of Physics, University of Stellenbosch, Matieland 7602, South Africa
| | - J F Sharpey-Schafer
- iThemba LABS, 7129 Somerset West, South Africa
- Department of Physics, University of the Western Cape, P/B X17 Bellville 7535, South Africa
| | - O Shirinda
- iThemba LABS, 7129 Somerset West, South Africa
| | - P Sithole
- iThemba LABS, 7129 Somerset West, South Africa
- Department of Physics, University of the Western Cape, P/B X17 Bellville 7535, South Africa
| | - M A Stankiewicz
- iThemba LABS, 7129 Somerset West, South Africa
- Department of Physics, University of Cape Town, Rondebosch 7700, South Africa
| | - M Wiedeking
- iThemba LABS, 7129 Somerset West, South Africa
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5
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Tonev D, Yavahchova MS, de Angelis G, Brant S, Frauendorf S, Petkov P, Dewald A, Zhong Q, Curien D, Goutev N, Bhowmik R, Singh R, Muralithar S, Madhavan N, Kumar R, Kumar Raju M, Kaur J, Mahanto G, Singh A, Kaur N, Garg R, Sukla A, Geleva E, Marinov TK. Lifetime measurements in mass regions A=100 and A=130 as a test for chirality in nuclear systems. EPJ WEB OF CONFERENCES 2016. [DOI: 10.1051/epjconf/201610703006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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6
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Kuti I, Chen QB, Timár J, Sohler D, Zhang SQ, Zhang ZH, Zhao PW, Meng J, Starosta K, Koike T, Paul ES, Fossan DB, Vaman C. Multiple chiral doublet bands of identical configuration in 103Rh. PHYSICAL REVIEW LETTERS 2014; 113:032501. [PMID: 25083635 DOI: 10.1103/physrevlett.113.032501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Indexed: 06/03/2023]
Abstract
Three sets of chiral doublet band structures have been identified in the ^{103}Rh nucleus. The properties of the observed chiral doublet bands are in good agreement with theoretical results obtained using constrained covariant density functional theory and particle rotor model calculations. Two of them belong to an identical configuration and provide the first experimental evidence for a novel type of multiple chiral doublets, where an "excited" chiral doublet of a configuration is seen together with the "yrast" one. This observation shows that the chiral geometry in nuclei can be robust against the increase of the intrinsic excitation energy.
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Affiliation(s)
- I Kuti
- Institute for Nuclear Research, Hungarian Academy of Sciences, Pf. 51, 4001 Debrecen, Hungary
| | - Q B Chen
- State Key Laboratory of Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - J Timár
- Institute for Nuclear Research, Hungarian Academy of Sciences, Pf. 51, 4001 Debrecen, Hungary
| | - D Sohler
- Institute for Nuclear Research, Hungarian Academy of Sciences, Pf. 51, 4001 Debrecen, Hungary
| | - S Q Zhang
- State Key Laboratory of Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - Z H Zhang
- State Key Laboratory of Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - P W Zhao
- State Key Laboratory of Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - J Meng
- State Key Laboratory of Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - K Starosta
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - T Koike
- Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
| | - E S Paul
- Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - D B Fossan
- Department of Physics and Astronomy, State University of New York, Stony Brook, New York 11794-3800, USA
| | - C Vaman
- Department of Physics and Astronomy, State University of New York, Stony Brook, New York 11794-3800, USA
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7
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Tonev D, Yavahchova MS, Goutev N, de Angelis G, Petkov P, Bhowmik RK, Singh RP, Muralithar S, Madhavan N, Kumar R, Kumar Raju M, Kaur J, Mohanto G, Singh A, Kaur N, Garg R, Shukla A, Marinov TK, Brant S. Candidates for twin chiral bands in 102Rh. PHYSICAL REVIEW LETTERS 2014; 112:052501. [PMID: 24580588 DOI: 10.1103/physrevlett.112.052501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2013] [Indexed: 06/03/2023]
Abstract
Excited states in 102Rh, populated in the fusion-evaporation reaction Zr94(11B,3n)102Rh at a beam energy of 36 MeV, were studied using the Indian National Gamma Array spectrometer at Inter University Accelerator Center, New Delhi. The angular correlations and the electromagnetic character of some of the gamma-ray transitions observed were investigated in detail. A new chiral candidate sister band was found. Lifetimes of exited states in both chiral candidate bands of 102Rh were measured for the first time in the A∼100 mass region by means of the Doppler-shift attenuation technique. The derived reduced transition probabilities are compared to the predictions of the two quasiparticles plus triaxial rotor model. Both experimental results and calculations do not support the presence of static chirality in 102Rh.
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Affiliation(s)
- D Tonev
- Bulgarian Academy of Sciences, Institute for Nuclear Research and Nuclear Energy, Sofia, Bulgaria
| | - M S Yavahchova
- Bulgarian Academy of Sciences, Institute for Nuclear Research and Nuclear Energy, Sofia, Bulgaria
| | - N Goutev
- Bulgarian Academy of Sciences, Institute for Nuclear Research and Nuclear Energy, Sofia, Bulgaria
| | - G de Angelis
- INFN, Laboratori Nazionali di Legnaro, Legnaro, Italy
| | - P Petkov
- Bulgarian Academy of Sciences, Institute for Nuclear Research and Nuclear Energy, Sofia, Bulgaria
| | - R K Bhowmik
- Inter-University Accelerator Center, New Delhi, India
| | - R P Singh
- Inter-University Accelerator Center, New Delhi, India
| | - S Muralithar
- Inter-University Accelerator Center, New Delhi, India
| | - N Madhavan
- Inter-University Accelerator Center, New Delhi, India
| | - R Kumar
- Inter-University Accelerator Center, New Delhi, India
| | - M Kumar Raju
- Nuclear Physics Department, Andhra University, Visakhapatnam, India
| | - J Kaur
- Department of Physics, Panjab University, Chandigarh, India
| | - G Mohanto
- Inter-University Accelerator Center, New Delhi, India
| | - A Singh
- Department of Physics, Panjab University, Chandigarh, India
| | - N Kaur
- Department of Physics, Panjab University, Chandigarh, India
| | - R Garg
- Department of Physics and Astrophysics, Delhi University, New Delhi, India
| | - A Shukla
- Department of Physics, Banaras Hindu University, Varanasi, India
| | - Ts K Marinov
- Bulgarian Academy of Sciences, Institute for Nuclear Research and Nuclear Energy, Sofia, Bulgaria
| | - S Brant
- Department of Physics, Faculty of Science, Zagreb University, Zagreb, Croatia
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8
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Yavahchova M, Goutev N, Tonev D, de Angelis G, Bhowmik RK, Petkov P, Singh RP, Muralithar S, Madhavan N, Kumar R, Kumar Raju M, Kaur J, Mohanto G, Singh A, Kaur N, Sukla A, Brant S, Garg R, Marinov T. Spectroscopy of the odd-odd chiral candidate nucleus 102Rh. EPJ WEB OF CONFERENCES 2014. [DOI: 10.1051/epjconf/20146602102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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9
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Ayangeakaa AD, Garg U, Anthony MD, Frauendorf S, Matta JT, Nayak BK, Patel D, Chen QB, Zhang SQ, Zhao PW, Qi B, Meng J, Janssens RVF, Carpenter MP, Chiara CJ, Kondev FG, Lauritsen T, Seweryniak D, Zhu S, Ghugre SS, Palit R. Evidence for multiple chiral doublet bands in 133Ce. PHYSICAL REVIEW LETTERS 2013; 110:172504. [PMID: 23679714 DOI: 10.1103/physrevlett.110.172504] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Indexed: 06/02/2023]
Abstract
Two distinct sets of chiral-partner bands have been identified in the nucleus 133Ce. They constitute a multiple chiral doublet, a phenomenon predicted by relativistic mean field (RMF) calculations and observed experimentally here for the first time. The properties of these chiral bands are in good agreement with results of calculations based on a combination of the constrained triaxial RMF theory and the particle-rotor model.
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Affiliation(s)
- A D Ayangeakaa
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
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10
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Lu BN, Zhao J, Zhao EG, Zhou SG. Potential energy surfaces of actinide and transfermium nuclei from multi-dimensional constraint covariant density functional theories. EPJ WEB OF CONFERENCES 2012. [DOI: 10.1051/epjconf/20123805003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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11
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Mukhopadhyay S, Almehed D, Garg U, Frauendorf S, Li T, Rao PVM, Wang X, Ghugre SS, Carpenter MP, Gros S, Hecht A, Janssens RVF, Kondev FG, Lauritsen T, Seweryniak D, Zhu S. From chiral vibration to static chirality in (135)Nd. PHYSICAL REVIEW LETTERS 2007; 99:172501. [PMID: 17995322 DOI: 10.1103/physrevlett.99.172501] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2007] [Indexed: 05/25/2023]
Abstract
Electromagnetic transition probabilities have been measured for the intraband and interband transitions in the two sequences in the nucleus (135)Nd that were previously identified as a composite chiral pair of rotational bands. The chiral character of the bands is affirmed and it is shown that their behavior is associated with a transition from a vibrational into a static chiral regime.
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Affiliation(s)
- S Mukhopadhyay
- Physics Department, University of Notre Dame, Notre Dame, Indiana 46556, USA
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12
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Joshi P, Carpenter MP, Fossan DB, Koike T, Paul ES, Rainovski G, Starosta K, Vaman C, Wadsworth R. Effect of gamma softness on the stability of chiral geometry: spectroscopy of 106Ag. PHYSICAL REVIEW LETTERS 2007; 98:102501. [PMID: 17358525 DOI: 10.1103/physrevlett.98.102501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2006] [Indexed: 05/14/2023]
Abstract
A study of the nucleus 106Ag has revealed the presence of two strongly coupled negative-parity rotational bands up to the 19- and 20- states, respectively, which cross each other at spin I approximately 14. The data suggest that near the crossover point the bands correspond to different shapes, which is different to the behavior expected from a pair of chiral bands. Inspection of the properties of these bands indicates a triaxial and a planar nature of rotation for the two structures. Possible causes for this may be understood in terms of a shape transformation resulting from the large degree of gamma softness of 106Ag. These data, along with the systematics of the odd-odd structures in the mass 100 region, suggest that gamma softness has marked implications for the phenomenon of nuclear chirality.
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Affiliation(s)
- P Joshi
- Department of Physics, University of York, Heslington, YO10 5DD, UK
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13
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Tonev D, de Angelis G, Petkov P, Dewald A, Brant S, Frauendorf S, Balabanski DL, Pejovic P, Bazzacco D, Bednarczyk P, Camera F, Fitzler A, Gadea A, Lenzi S, Lunardi S, Marginean N, Möller O, Napoli DR, Paleni A, Petrache CM, Prete G, Zell KO, Zhang YH, Zhang JY, Zhong Q, Curien D. Transition probabilities in 134Pr: a test for chirality in nuclear systems. PHYSICAL REVIEW LETTERS 2006; 96:052501. [PMID: 16486924 DOI: 10.1103/physrevlett.96.052501] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2005] [Indexed: 05/06/2023]
Abstract
Exited states in 134Pr were populated in the fusion-evaporation reaction 119Sn(19F,4n)134Pr. Recoil distance Doppler-shift and Doppler-shift attenuation measurements using the Euroball spectrometer, in conjunction with the inner Bismuth Germanate ball and the Cologne plunger, were performed at beam energies of 87 MeV and 83 MeV, respectively. Reduced transition probabilities in 134Pr are compared to the predictions of the two quasiparticle + triaxial rotor and interacting boson fermion-fermion models. The experimental results do not support the presence of static chirality in 134Pr underlying the importance of shape fluctuations. Only within a dynamical context the presence of intrinsic chirality in 134Pr can be supported.
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Affiliation(s)
- D Tonev
- Laboratori Nazionali di Legnaro, INFN, I-35020 Legnaro, Italy
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14
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Koike T, Starosta K, Hamamoto I. Chiral bands, dynamical spontaneous symmetry breaking, and the selection rule for electromagnetic transitions in the chiral geometry. PHYSICAL REVIEW LETTERS 2004; 93:172502. [PMID: 15525069 DOI: 10.1103/physrevlett.93.172502] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2004] [Revised: 07/29/2004] [Indexed: 05/24/2023]
Abstract
A model for a special configuration in triaxial odd-odd nuclei is constructed which exhibits degenerate chiral bands with a sizable rotation, a manifestation of dynamical spontaneous symmetry breaking. A quantum number obtained from the invariance of the model Hamiltonian, which characterizes observable states, is given and selection rules for electromagnetic transition probabilities in chiral bands is derived in terms of this quantum number. The degeneracy of the lowest two bands is indeed obtained in the numerical diagonalization of the Hamiltonian at an intermediate spin range, over which electromagnetic transitions follow exactly the selection rule expected for the chiral geometry.
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Affiliation(s)
- T Koike
- Department of Physics and Astronomy, SUNY at Stony Brook, New York 11794, USA
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15
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Olbratowski P, Dobaczewski J, Dudek J, Płóciennik W. Critical frequency in nuclear chiral rotation. PHYSICAL REVIEW LETTERS 2004; 93:052501. [PMID: 15323689 DOI: 10.1103/physrevlett.93.052501] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2004] [Indexed: 05/24/2023]
Abstract
Self-consistent solutions for the so-called planar and chiral rotational bands in 132La are obtained for the first time within the Skyrme-Hartree-Fock cranking approach. It is suggested that the chiral rotation cannot exist below a certain critical frequency which under the approximations used is estimated as Planck's omega(crit) approximately 0.5-0.6 MeV. However, the exact values of Planck's omega(crit) may vary, to an extent, depending on the microscopic model used, in particular, through the pairing correlations and/or calculated equilibrium deformations. The existence of the critical frequency is explained in terms of a simple classical model of two gyroscopes coupled to a triaxial rigid body.
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Affiliation(s)
- P Olbratowski
- Institute of Theoretical Physics, Warsaw University, Hoza 69, PL-00681 Warsaw, Poland
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16
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Vaman C, Fossan DB, Koike T, Starosta K, Lee IY, Macchiavelli AO. Chiral degeneracy in triaxial 104Rh. PHYSICAL REVIEW LETTERS 2004; 92:032501. [PMID: 14753867 DOI: 10.1103/physrevlett.92.032501] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2003] [Indexed: 05/24/2023]
Abstract
Chiral doublet bands based on the pi g(9/2) multiply sign in circle nu h(11/2) configuration that achieve degeneracy at spin I=17 in the odd-odd triaxial 104Rh nucleus have been observed. Experimental verification of the interpretation has been tested against specific fingerprints of chirality in the intrinsic system.
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Affiliation(s)
- C Vaman
- Department of Physics and Astronomy, SUNY at Stony Brook, Stony Brook, New York 11794-3800, USA
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17
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Zhu S, Garg U, Nayak BK, Ghugre SS, Pattabiraman NS, Fossan DB, Koike T, Starosta K, Vaman C, Janssens RVF, Chakrawarthy RS, Whitehead M, Macchiavelli AO, Frauendorf S. A composite chiral pair of rotational bands in the odd-A nucleus 135Nd. PHYSICAL REVIEW LETTERS 2003; 91:132501. [PMID: 14525299 DOI: 10.1103/physrevlett.91.132501] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2003] [Revised: 05/14/2003] [Indexed: 05/24/2023]
Abstract
High-spin states in 135Nd were populated with the 110Pd(30Si,5n)135Nd reaction at a 30Si bombarding energy of 133 MeV. Two DeltaI=1 bands with close excitation energies and the same parity were observed. These bands are directly linked by DeltaI=1 and DeltaI=2 transitions. The chiral nature of these two bands is confirmed by comparison with three-dimensional tilted axis cranking calculations. This is the first observation of a three-quasiparticle chiral structure and establishes the primarily geometric nature of this phenomenon.
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Affiliation(s)
- S Zhu
- Physics Department, University of Notre Dame, Notre Dame, Indiana 46556, USA
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