Probing the critical behavior in the evolution of GDR width at very low temperatures in A ∼ 100 mass region

被引：26

作者：

Dey, Balaram ^{[1
]}

Mondal, Debasish ^{[1
]}

Pandit, Deepak ^{[1
]}

Mukhopadhyay, S. ^{[1
]}

Pal, Surajit ^{[1
]}

Bhattacharya, Srijit ^{[2
]}

De, A. ^{[3
]}

Banerjee, K. ^{[1
]}

Dinh Dang, N. ^{[4
]}

Quang Hung, N. ^{[5
]}

Banerjee, S. R. ^{[1
]}

机构：

[1] Ctr Variable Energy Cyclotron, Kolkata 700064, India

[2] Barasat Govt Coll, Dept Phys, Kolkata 700124, India

[3] Raniganj Girls Coll, Dept Phys, Raniganj 713358, India

[4] RIKEN, Nishina Ctr Accelerator Based Sci, Theoret Nucl Phys Lab, Wako, Saitama 3510198, Japan

[5] Tan Tao Univ, Sch Engn, Duc Hoa, Long An Provinc, Vietnam

来源：

PHYSICS LETTERS B | 2014年 / 731卷

关键词：

Low temperature GDR width; Adiabatic thermal shape fluctuation model; Critical temperature included fluctuation model; Phonon damping model; GIANT-DIPOLE RESONANCE; THERMAL SHAPE FLUCTUATIONS; HOT ROTATING NUCLEI; PHENOMENOLOGICAL DESCRIPTION; DEFORMED-NUCLEI; DEPENDENCE; DAMPINGS; DETECTOR; FUSION; SN-120;

D O I：

10.1016/j.physletb.2014.02.007

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The influence of giant dipole resonance (GDR) induced quadrupole moment on GDR width at low temperatures is investigated experimentally by measuring GDR width systematically in the unexplored temperature range T = 0.8-1.5 MeV, for the first time, in A similar to 100 mass region. The measured GDR widths, using alpha induced fusion reaction, for Tc-97 confirm that the GDR width remains constant at the ground state value up to a critical temperature and increases sharply thereafter with increase in T. The data have been compared with the adiabatic Thermal Shape Fluctuation Model (TSFM), phenomenological Critical Temperature Fluctuation Model (CTFM) and microscopic Phonon Damping Model (PDM). Interestingly, CTFM and PDM give similar results and agree with the data, whereas the TSFM differs significantly even after incorporating the shell effects. (C) 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org!licenses/by/3.0/).

引用

页码：92 / 96

页数：5

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