Measurements of interaction cross sections and nuclear radii in the light p-shell region.
Measurements of interaction cross sections and nuclear radii in the light p-shell region.
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DOI：
10.1103/physrevlett.55.2676
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发表时间：
1985-12
影响因子：
8.6
通讯作者：
I. Tanihata;H. Hamagaki;O. Hashimoto;Y. Shida;N. Yoshikawa;K. Sugimoto;O. Yamakawa;T. Kobayashi-T.-Kobayas
中科院分区：
文献类型：
--
作者：
I. Tanihata;H. Hamagaki;O. Hashimoto;Y. Shida;N. Yoshikawa;K. Sugimoto;O. Yamakawa;T. Kobayashi-T.-Kobayas
在790 MeV/核子下，测量了所有已知的锂同位素({^{6}、{Li}、{Be}、Be、Al)的相互作用截面。这些同位素的均方根半径以及氦同位素的均方根半径都是由Glauber型计算得到的。首次观察到同量异构体({6}-{6}-{6}-{Li})、{8}-{8}-{8}-{Li}和{9}-{9}-{Be}之间存在明显的半径差异。原子核{Li}的半径非常大，表明物质分布有大的形变或长尾。
Interaction cross sections (${\ensuremath{\sigma}}_{I}$) for all known Li isotopes ($^{6}\mathrm{Li}$-$^{11}\mathrm{Li}$) and $^{7}\mathrm{Be}$, $^{9}\mathrm{Be}$, and $^{10}\mathrm{Be}$ on targets Be, C, and Al have been measured at 790 MeV/nucleon. Root mean square radii of these isotopes as well as He isotopes have been deduced from the ${\ensuremath{\sigma}}_{I}$ by a Glauber-type calculation. Appreciable differences of radii among isobars ($^{6}\mathrm{He}$-$^{6}\mathrm{Li}$, $^{8}\mathrm{He}$-$^{8}\mathrm{Li}$, and $^{9}\mathrm{Li}$-$^{9}\mathrm{Be}$) have been observed for the first time. The nucleus $^{11}\mathrm{Li}$ showed a remarkably large radius suggesting a large deformation or a long tail in the matter distribution.