Thermal bremsstrahlung photons probing the nuclear caloric curve

被引：27

作者：

d'Enterria, DG

Martínez, G

Aphecetche, L

Delagrange, H

Fernández, F

Löhner, H

Ortega, R

Ostendorf, R

Schutz, Y

Wilschut, HW

机构：

[1] SUBATECH, F-44307 Nantes, France

[2] Kernfys Versneller Inst, NL-9747 AA Groningen, Netherlands

[3] Univ Autonoma Barcelona, Grp Fis Radiac, Cerdanyola Del Valles 08193, Catalonia, Spain

来源：

PHYSICS LETTERS B | 2002年 / 538卷 / 1-2期

关键词：

nucleus-nucleus reactions; hard photons; caloric curve;

D O I：

10.1016/S0370-2693(02)01973-1

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Hard-photon (E-gamma > 30 MeV) emission from second-chance nucleon-nucleon bremsstrahlung collisions in intermediate energy heavy-ion reactions is studied employing a realistic thermal model. Photon spectra and yields measured in several nucleus-nucleus reactions are consistent with an emission from hot nuclear systems with temperatures T approximate to 4-7 MeV. The corresponding caloric curve in the region of excitation energies epsilon* approximate to 3A-8A MeV shows lower values of T than those expected for a Fermi fluid. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：27 / 32

页数：6

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