ON THE OBSERVATION OF AN ANTIPROTON STAR IN EMULSION EXPOSED AT THE BEVATRON
ON THE OBSERVATION OF AN ANTIPROTON STAR IN EMULSION EXPOSED AT THE BEVATRON
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DOI：
10.1007/bf02745430
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发表时间：
1956-01-01
期刊：
影响因子：
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通讯作者：
MANFREDINI, A
中科院分区：
文献类型：
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作者：
CHAMBERLAIN, O;CHUPP, WW;MANFREDINI, A
为了在贝瓦特加速器上进行反质子研究，几堆核乳胶被暴露在磁选择的负粒子束中。选定的粒子是在铜靶中产生的，用6.3 GeV的质子轰击，动量为1.09 GeV/c。实验的目的是观察在乳胶中静止的反质子所经历的湮灭过程。调查详情见第2节。第3节包含了对预期湮灭星的数量的估计，这些估计是通过张伯伦、塞格雷、韦根和伊普西兰蒂斯报道的反实验从以前的测量中获得的。第4节包含迄今为止发现的唯一事件的描述。用几种独立的方法加权平均得到的产生它的一次粒子的质量为（1824 ±51）me. The星星产生的最小可见光能量为1.826 MeV，而相应的不平衡可见光动量为1.520 MeV/c。
In connection with the antiproton investigation at the Bevatron several stacks of nuclear emulsions have been exposed in a magnetically selected beam of negative particles. The selected particles were produced in a copper target, bombarded with protons of 6.3 GeV, and had a momentum of 1.09 GeV/c. The experiments were designed to observe the annihilation process undergone by an antiproton brought to rest inside the emulsion. The details of the investigation are given in Section 2. Section 3 contains an estimate of the number of expected annihilation stars as obtained from previous measurements with counter experiments reported by Chamberlain, Segrè, Wiegand and Ypsilantis. Section 4 contains the description of the only event found so far. The mass of the primary particle responsible for it, as obtained from a weighted average using several independent methods is (1824 ±51) me. The star produced by it, is associated with a minimun release of « visible » energy of ∼ 826 MeV while the corresponding unbalanced « visible » momentum amounts to ∼ 520 MeV/c.