Effects of pairing correlations on the inverse level density parameter of hot rotating nuclei

3rd International Workshop on Theoretical and Computational Physics: Complex Systems and Interdisciplinary Physics;40th National Conference on Theoretical Physics

物理学;计算机科学

Huong, Le Thi Quynh^1,2 ; Hung, Nguyen Quang^3 ; Trang, Le Thi Quynh^4

Department of Natural Science and Technology, Khanh Hoa University, Nha Trang City, Khanh Hoa Province, Viet Nam^1

Faculty of Physics and Engineering Physics, Ho Chi Minh University of Science, Ho Chi Minh City, Viet Nam^2

Institute of Research and Development, Duy Tan University, K7/25 Quang Trung, Danang city, Viet Nam^3

School of Engineering, Tan Tao University, Tan Tao University Avenue, Tan Duc E.City, Duc Hoa, Long An Province, Viet Nam^4

关键词: Bardeen-Cooper-Schrieffer;    Critical temperatures;    Even-even nuclei;    Finite temperatures;    Nonzero values;    Number fluctuations;    Pairing correlations;    Quasi particles;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/726/1/012011/pdf
DOI  :  10.1088/1742-6596/726/1/012011

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Angular momentum dependence of the inverse level density parameter K in the excitation-energy region of ∼ 30 - 40 MeV is studied within the finite-temperature Bardeen-Cooper-Schrieffer (FTBCS) theory and the FTBCS theory that includes the effect due to quasiparticle-number fluctuations (FTBCS1). The two theories take into account the noncollective rotation of the nucleus at nonzero values of z-projection M of the total angular momentum. The comparison between the results obtained within the FTBCS and FTBCS1 as well as the case without pairing correlations and the experimental data for two medium-mass even-even nuclei108Cd and122Te shows that by including the pairing corrections the FTBCS and FTBCS1 reproduces quite well all the experimental data, whereas the non-pairing case always overestimates the data. Due to the effect of quasiparticle-number fluctuations, the FTBCS1 gaps at different M values do not collapse at critical temperature TCas in the FTBCS ones but monotonously decrease with increasing T and being finite even at high T. As the result, the values of K obtained within the FTBCS1 are always closer to the experimental data than those obtained within the FTBCS.