Measurements of 10Be and 26Al production cross sections with 12 GeV protons by accelerator mass spectrometry.
Measurements of 10Be and 26Al production cross sections with 12 GeV protons by accelerator mass spectrometry.
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通过加速器质谱法用 12 GeV 质子测量 10Be 和 26Al 生产截面。
DOI：
10.1103/physrevc.48.2617
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
Fujiwara
中科院分区：
文献类型：
--
作者：
Shibata;Imamura;Nagai;Kobayashi;Sakamoto;Furukawa;Fujiwara
用加速器质谱法测定了12 GeV质子辐照下Al、Fe、Co、Ni、Cu、Zn、Ag和Au靶上[sup 10]Be和[sup 26]Al的形成截面。得到的截面与文献中在实验不确定度范围内其他质子能量下测量值预测的激发函数一致。[sup 10]Be的横截面随着目标质量的增大而增大。另一方面，[sup 26]Al的横截面从Al靶材到Ag靶材减小，但从Ag靶材到Au靶材略有增加。讨论了[sup 7]Be、[sup 22]Na和[sup 24]Na的[sup 10]Be和[sup 26]Al的形成机理，并利用Campi [ital et] [ital Al]的通用公式将实验结果拟合到计算值。在讨论过程中，我们引入了一个新的参数，即中子过剩度（[数字N][减去][数字Z]）/[数字a]，以便更清晰地对光碎片进行分类。
The formation cross sections of [sup 10]Be and [sup 26]Al from Al, Fe, Co, Ni, Cu, Zn, Ag, and Au targets irradiated with 12 GeV protons were measured by accelerator mass spectrometry. The obtained cross sections were consistent with the excitation functions predicted from the literature values measured at other proton energies within the experimental uncertainties. The [sup 10]Be cross sections increased with an increase in the target mass. On the other hand, the [sup 26]Al cross sections decreased from Al to Ag targets, but increased somewhat from Ag to Au. The formation mechanisms of [sup 10]Be and [sup 26]Al including [sup 7]Be, [sup 22]Na, and [sup 24]Na are discussed with respect to fitting of the experimental results to the calculated values using the universal formula of Campi [ital et] [ital al]. During the course of the discussion, we introduce a new parameter, the degree of neuton excess ([ital N][minus][ital Z])/[ital A], in order to classify light fragments more clearly.