dorsal/arxiv
View SchemaOrbital M1 versus E2 strength in deformed nuclei: A new energy weighted sum rule
| Authors | E. Moya de Guerra, L. Zamick |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9303011 |
| URL | https://arxiv.org/abs/nucl-th/9303011 |
| DOI | 10.1103/PhysRevC.47.2604 |
| Journal | Phys.Rev.C47:2604-2609,1993 |
Abstract
Within the unified model of Bohr and Mottelson we derive the following linear energy weighted sum rule for low energy orbital 1$^+$ excitations in even-even deformed nuclei $$S_{\rm LE}^{\rm lew} (M_1^{\rm orb}) \cong (6/5) \epsilon (B(E2; 0^+_1 \rightarrow 2_1^+ K=0)/Z e^2<r^2>^2) \mu^2_N$$ with B(E2) the E2 strength for the transition from the ground state to the first excited state in the ground state rotational band, $<r^2>$ the charge r.m.s. radius squared and $\epsilon$ the binding energy per nucleon in the nuclear ground state. It is shown that this energy weighted sum rule is in good agreement with available experimental data. The sum rule is derived using a simple ansatz for the intrinsic ground state wave function that predicts also high energy 1$^+$ strength at 2$\hbar \omega$ carrying 50\% of the total $m_1$ moment of the orbital M1 operator.
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"abstract": "Within the unified model of Bohr and Mottelson we derive the following linear\nenergy weighted sum rule for low energy orbital 1$^+$ excitations in even-even\ndeformed nuclei $$S_{\\rm LE}^{\\rm lew} (M_1^{\\rm orb}) \\cong (6/5) \\epsilon\n(B(E2; 0^+_1 \\rightarrow 2_1^+ K=0)/Z e^2\u003cr^2\u003e^2) \\mu^2_N$$ with B(E2) the E2\nstrength for the transition from the ground state to the first excited state in\nthe ground state rotational band, $\u003cr^2\u003e$ the charge r.m.s. radius squared and\n$\\epsilon$ the binding energy per nucleon in the nuclear ground state. It is\nshown that this energy weighted sum rule is in good agreement with available\nexperimental data. The sum rule is derived using a simple ansatz for the\nintrinsic ground state wave function that predicts also high energy 1$^+$\nstrength at 2$\\hbar \\omega$ carrying 50\\% of the total $m_1$ moment of the\norbital M1 operator.",
"arxiv_id": "nucl-th/9303011",
"authors": [
"E. Moya de Guerra",
"L. Zamick"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.47.2604",
"journal_ref": "Phys.Rev.C47:2604-2609,1993",
"title": "Orbital M1 versus E2 strength in deformed nuclei: A new energy weighted sum rule",
"url": "https://arxiv.org/abs/nucl-th/9303011"
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