LIFETIMES OF WELL CHARACTERIZED HOT NUCLEI VIA SMALL-ANGLE PARTICLE-PARTICLE CORRELATIONS - AR-40+AG(E/A=7.8 AND 17 MEV)

被引：19

作者：

ELMAANI, A

ALEXANDER, JM

AJITANAND, NN

LACEY, RA

KOX, S

LIATARD, E

MERCHEZ, F

MOTOBAYASHI, T

NOREN, B

PERRIN, C

REBREYEND, D

CHAN, TU

AUGER, G

GROULT, S

机构：

[1] SUNY STONY BROOK, DEPT CHEM, STONY BROOK, NY 11794 USA

[2] UNIV JOSEPH FOURIER, INST SCI NUCL GRENOBLE, CNRS, IN2P3, F-38026 GRENOBLE, FRANCE

[3] GRAND ACCELERATEUR NATL IONS LOURDS, F-14021 CAEN, FRANCE

来源：

PHYSICAL REVIEW C | 1994年 / 49卷 / 01期

关键词：

D O I：

10.1103/PhysRevC.49.284

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Particle-particle correlations are studied for large- and small-angle separations for the reactions 312 and 680 MeV Ar-40 + Ag-nat. The spectral shapes and angular anisotropies allow a characterization of the effective temperatures and spin zones of the hot nuclear emission sources. Small-angle correlations are compared to reaction simulations that employ various parametrizations for the emission time scales. We conclude that the initial lifetime scale for H-1,H-2,H-3 particle evaporation is of the order of 10(-22) s. These times are so short as to suggest a breakdown of the concept of ''sequential evaporation,'' for which a new ansatz is explored.

引用

页码：284 / 297

页数：14

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