清晨好,您是今天最早来到科研通的研友!由于当前在线用户较少,发布求助请尽量完整地填写文献信息,科研通机器人24小时在线,伴您科研之路漫漫前行!

Equilibration in relativistic nuclear collisions. A Monte Carlo calculation

物理 π介子 核子 核物理学 蒙特卡罗方法 动能 迅速 碰撞 重子 粒子物理学 强子 经典力学 数学 计算机安全 计算机科学 统计
作者
Joseph Cugnon,T. Mizutani,J. Vandermeulen
出处
期刊:Nuclear Physics [Elsevier BV]
卷期号:352 (3): 505-534 被引量:390
标识
DOI:10.1016/0375-9474(81)90427-9
摘要

A relativistic Monte Carlo calculation of the nucleus-nucleus interaction in the GeV range is presented. The interaction process is described as a sequence of classical, binary, on-shell baryon-baryon collisions. Pion production is introduced via the formation of Δ-resonances. The latter are given a definite mass and a lifetime against pion emission larger than the collision time. They are, however, assumed to scatter or disappear in collisions with nucleons. At the end of the collision process, they are allowed to decay. The model is used to study the equilibration during a head-on collision between two 40Ca nuclei. The system is found to be compressed up to a time 6–8 fm/c and to decompress very rapidly. The final nucleon and pion momentum distributions are not completely thermalized. They are, however, tentatively described by effective temperatures. The rapidity distributions show larger temperatures than the perpendicular momentum distributions. Also, nucleon temperatures are generally larger than pion temperatures. The theoretical transverse temperatures and the pion multiplicities agree fairly well with the experimental data. The role of the delta particles is investigated. It is shown that the delta production quickens the equilibration process by transforming longitudinal kinetic energy into mass energy. Furthermore, it favours high compression of the system. Non-central collisions are studied. The results are consistent with the concept of geometrical separation between participant and spectator nucleons. However, our model predicts more transparency than the so-called fireball model. The participant part is shown to decompress very rapidly, while the spectator parts are slightly kicked off for intermediate impact parameters. Finally, some results are shown for the case of a head-on collision of a 20Ne projectile by a 60Ni target. A strong shock wave propagates into the target for several fm/c, after which all the matter is dispersed.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
四叶草完成签到 ,获得积分10
3秒前
Wen完成签到 ,获得积分10
7秒前
拼搏的羊青完成签到 ,获得积分10
29秒前
huanghe完成签到,获得积分10
45秒前
wbh完成签到,获得积分10
46秒前
蛋妮完成签到 ,获得积分10
52秒前
1分钟前
柏月发布了新的文献求助10
1分钟前
平平平平完成签到 ,获得积分10
1分钟前
QQQQQQQ发布了新的文献求助30
1分钟前
蛋卷完成签到 ,获得积分10
1分钟前
汉堡包应助科研通管家采纳,获得10
1分钟前
科研通AI2S应助科研通管家采纳,获得10
1分钟前
情怀应助Destiny采纳,获得10
2分钟前
科研的豪哥完成签到 ,获得积分10
2分钟前
youwenjing11完成签到 ,获得积分10
2分钟前
匆匆完成签到 ,获得积分10
2分钟前
呆呆的猕猴桃完成签到 ,获得积分10
2分钟前
加贝完成签到 ,获得积分10
2分钟前
泥泞完成签到 ,获得积分10
2分钟前
kingcoffee完成签到 ,获得积分10
2分钟前
大水完成签到 ,获得积分10
3分钟前
科研通AI2S应助cc采纳,获得10
3分钟前
王洋洋完成签到 ,获得积分10
3分钟前
zzf关闭了zzf文献求助
3分钟前
JamesPei应助ceeray23采纳,获得30
3分钟前
cc完成签到,获得积分10
3分钟前
宝贝完成签到 ,获得积分10
4分钟前
科目三应助dingding采纳,获得10
4分钟前
4分钟前
研友_Y59785应助常有李采纳,获得10
4分钟前
zhdjj完成签到 ,获得积分10
4分钟前
CC发布了新的文献求助10
4分钟前
Davidjin完成签到,获得积分10
4分钟前
平常的三问完成签到 ,获得积分10
4分钟前
natsu401完成签到 ,获得积分10
4分钟前
我睡觉的时候不困完成签到 ,获得积分10
5分钟前
perfect完成签到 ,获得积分10
5分钟前
星辰大海应助常有李采纳,获得20
5分钟前
5分钟前
高分求助中
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3990732
求助须知:如何正确求助?哪些是违规求助? 3532220
关于积分的说明 11256570
捐赠科研通 3271081
什么是DOI,文献DOI怎么找? 1805229
邀请新用户注册赠送积分活动 882302
科研通“疑难数据库(出版商)”最低求助积分说明 809234