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arXiv 1110.1982nucl-ex
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质子上$^7$ Li相对论核碎裂到$^3$ H+ $^4$ He通道

Fragmentation of $^7$Li Relativistic Nuclei on a Proton into the $^3$H+$^4$He Channel

N. G. Peresadko, Yu. A. Alexandrov, S. G. Gerasimov, V. A. Dronov, V. G. Larionova, A. V. Pisetskaya, A. I. Malakhov, E. I. Tamm, V. N. Fetisov, S. P. Kharlamov, L. N. Shesterkina

摘要:

在联合核研究所(JINR,杜布纳)的同步相位加速器中,将$^7$ Li核加速到每核子3 GeV/ $c$的动量,在暴露于一束$^7$ Li核的径迹照相乳剂中,在3730个非弹性相互作用事件中检测到13个事件,其中$^7$ Li核与质子相互作用破裂成$^3$ H和$^4$ He碎片。对于该断裂通道,发现横截面为$8\pm2$ mb。碎片总横动量的平均值为$214\pm5$ MeV/ $c$。这个值明显高于$^7$ Li核在径迹乳胶核上相干解离的横向动量转移平均值($166\pm5$ MeV/ $c$)。反冲质子横动量平均占总质子动量的98%。质子的动量分布的特征在于方差为16 MeV/ $c$,平均值为$37\pm2$ MeV/ $c$。

英文摘要:

In a track nuclear photoemulsion exposed to a beamof $^7$Li nuclei accelerated to a momentum of 3 GeV/$c$ per nucleon at the synchrophasotron of the Joint Institute for Nuclear Research (JINR, Dubna), 13 events in which $^7$Li nuclei interacting with protons break up into $^3$H and $^4$He fragments were detected among 3730 inelastic-interaction events. For this fragmentation channel, the cross section was found to be $8\pm2$ mb. The average value of the fragment total transverse momentum was $214\pm5$ MeV/$c$. This value exceedsmarkedly the average value of the transverse-momentumtransfer in the coherent dissociation of $^7$Li nuclei on track-emulsion nuclei ($166\pm5$ MeV/$c$). The recoil-proton transverse momentum was on average 98% of the total proton momentum. The longitudinal-momentum distribution of protons was characterized by a variance of 16 MeV/$c$ and a mean value of $37\pm2$ MeV/$c$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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