17C反应截面的测量及其密度分布分析

在日本理化学研究所的放射性束流线上用透射法测量了能量为79 MeV/u的17C在12C反应靶上的反应截面；利用有限力程Glauber模型对17C的密度分布进行了分析. 同时拟合本实验结果及高能区的实验数据发现, 17C的中子密度分布中存在一个尾巴. 基于芯核加单粒子密度分布的假设,认为17C的价中子主要处于1d5/2轨道. We have measured the reaction cross section of 17C on a 12C target at 79 MeV/u using the transmission method. Together with previous data at high energy, we deduced the density distribution of 17C by fitting the experimental data using the finite range Glauber model. The analysis shows that a simple harmonic oscillator (HO) density is not adequate to explain consistently the present experimental data and the one at high energy simultaneously. To get a better fit of both the data, the existence of a tail in the density distribution of 17C is proposed. Based on the assumption of a core plus a single neutron, it is found that the valence neutron of 17C is mostly in the d orbital. This is in agreement with the conclusion from the measured momentum distribution.

Measurement of Reaction Cross Section for 17C and Study of Its Nuclear Matter Density Distribution

We have measured the reaction cross section of ~(17)C on a ~(12)C target at 79 MeV/u using the transmission method. Together with previous data at high energy, we deduced the density distribution of ~(17)C by fitting the experimental data using the finite-range Glauber model. The analysis shows that a simple harmonic-oscillator (HO) density is not adequate to explain consistently the present experimental data and the one at high energy simultaneously. To get a better fit of both the data, the existence of a tail in the density distribution of ~(17)C is proposed. Based on the assumption of a core plus a single neutron, it is found that the valence neutron of ~(17)C is mostly in the d-orbital. This is in agreement with the conclusion from the measured momentum distribution.