Isospin Symmetry and Core Polarization in Z=8 and N=8 Single Closed Shell Nuclei

这个项目涉及厄勒姆学院的本科生，研究外来核中质子和中子行为的差异。质子和中子对激发态的贡献可以通过比较对质子和中子具有不同灵敏度的实验测量来解开。放射性束流技术的出现使得通过逆运动学质子散射、电磁寿命测量和库仑激发对远离稳定的原子核进行这样的研究成为可能。本项目的重点是研究N=8和Z=8单闭壳核的集体激发。计划进行三项测量，在佛罗里达州立大学（FSU）对Ne-18的第一激发态进行伽马射线寿命测量，在国家超导回旋加速器实验室（NSCL）对氖-18和氧-22的第一激发态进行逆运动学质子散射测量。该项目将持续三年，每年夏天有一到两名学生参加8-10周的学习。参与者将前往nsl或fsu进行实验，并将在厄勒姆分析数据。

This project involves Earlham College undergraduates in the study ofdifferences in proton and neutron behavior in exotic nuclei. Protonand neutron contributions to excited states can be disentangled bycomparing experimental measurements that have differentsensitivities to protons and neutrons. The advent of radioactivebeam technology has enabled such investigations of nuclei away fromstability via inverse kinematics proton scattering, electromagneticlifetime measurements, and Coulomb excitation. The focus of thisproject is on collective excitations in N=8 and Z=8 single closedshell nuclei. Three measurements are planned, a gamma-ray lifetimemeasurement of the first excited state of Ne-18 at Florida StateUniversity (FSU) and inverse kinematics proton scatteringmeasurements of the first excited states of Neon-18 and Oxygen-22 atthe National Superconducting Cyclotron Laboratory (NSCL). Theproject will span three years and involve one to two students for8-10 weeks per summer. Participants will to travel to the NSCL orFSU to perform experiments and will analyze the data at Earlham.