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TWO-PHOTON INTERFEROMETRY IN Ta+Au COLLISIONS AT 40A MeV

机译:Ta + Au碰撞中40A MeV的两光子干涉

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摘要

The space-time dimensions of the Ta+Au collision zone at 40A MeV energy are investigated using the HBT interferometry technique of γγ pairs. The bremsstrahlung photon energy spectrum exhibits 2 exponential contributions, described by the inverse slopes 13.0 ± 0.2 MeV and 5.1 ± 0.3 MeV, and the ratio of integrated intensities 2.2 ± 0.3. The correlation function, investigated inclusively and for peripheral reactions, reveals no HBT signal. For central collisions there is a strong indication for such signal, best described by the invariant radius 10.3 ± 2.7 fm within the model of the Gaussian space-time distribution of the photon emission source. The appearance of the HBT signal for central collisions only can be explained within simple models of photon emission in two stages of reaction.
机译:利用γ对的HBT干涉技术研究了40A MeV能量下Ta + Au碰撞区的时空尺度。致辐射光子能谱表现出2个指数贡献,用反斜率13.0±0.2 MeV和5.1±0.3 MeV以及积分强度之比2.2±0.3来描述。相关性功能,包括广泛的研究和周围反应,没有发现HBT信号。对于中心碰撞,有强烈的信号指示,最好用光子发射源的高斯时空分布模型中的不变半径10.3±2.7 fm来描述。仅在两个阶段的反应中,仅可以在光子发射的简单模型中解释用于中心碰撞的HBT信号的出现。

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