Nuclear charge radius for He 3
2006; American Physical Society; Volume: 73; Issue: 3 Linguagem: Inglês
10.1103/physreva.73.034502
ISSN1538-4446
AutoresD. C. Morton, Qixue Wu, G. W. F. Drake,
Tópico(s)Atomic and Subatomic Physics Research
ResumoAn rms nuclear charge radius ${r}_{\mathrm{c}}=1.9642(11)\phantom{\rule{0.3em}{0ex}}\mathrm{fm}$ for $^{3}\mathrm{He}$ is derived from measurements of the $2\phantom{\rule{0.2em}{0ex}}^{3}S_{1}\text{\ensuremath{-}}2\phantom{\rule{0.2em}{0ex}}^{3}P_{0}$ isotope shift combined with the best available data on the fine structure of $^{4}\mathrm{He}$, the hyperfine structure of $^{3}\mathrm{He}$, and an assumed ${r}_{\mathrm{c}}=1.673(1)\phantom{\rule{0.3em}{0ex}}\mathrm{fm}$ for $^{4}\mathrm{He}$. The result removes a small discrepancy between some older spectroscopic determinations of ${r}_{\mathrm{c}}$ for $^{3}\mathrm{He}$ from this transition and a more recent measurement.
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