تقرير
The $^{150}$Nd($^3$He,$t$) and $^{150}$Sm($t$,$^3$He) reactions with applications to $\beta\beta$ decay of $^{150}$Nd
| العنوان: | The $^{150}$Nd($^3$He,$t$) and $^{150}$Sm($t$,$^3$He) reactions with applications to $\beta\beta$ decay of $^{150}$Nd |
|---|---|
| المؤلفون: | Guess, C. J., Adachi, T., Akimune, H., Algora, A., Austin, Sam M., Bazin, D., Brown, B. A., Caesar, C., Deaven, J. M., Ejiri, H., Estevez, E., Fang, D., Faessler, A., Frekers, D., Fujita, H., Fujita, Y., Fujiwara, M., Grinyer, G. F., Harakeh, M. N., Hatanaka, K., Herlitzius, C., Hirota, K., Hitt, G. W., Ishikawa, D., Matsubara, H., Meharchand, R., Molina, F., Okamura, H., Ong, H. J., Perdikakis, G., Rodin, V., Rubio, B., Shimbara, Y., Süsoy, G., Suzuki, T., Tamii, A., Thies, J. H., Tur, C., Verhanovitz, N., Yosoi, M., Yurkon, J., Zegers, R. G. T., Zenihiro, J. |
| سنة النشر: | 2011 |
| المجموعة: | Nuclear Experiment Nuclear Theory |
| مصطلحات موضوعية: | Nuclear Experiment, Nuclear Theory |
| الوصف: | The $^{150}$Nd($^3$He,$t$) reaction at 140 MeV/u and $^{150}$Sm($t$,$^3$He) reaction at 115 MeV/u were measured, populating excited states in $^{150}$Pm. The transitions studied populate intermediate states of importance for the (neutrinoless) $\beta\beta$ decay of $^{150}$Nd to $^{150}$Sm. Monopole and dipole contributions to the measured excitation-energy spectra were extracted by using multipole decomposition analyses. The experimental results were compared with theoretical calculations obtained within the framework of Quasiparticle Random-Phase Approximation (QRPA), which is one of the main methods employed for estimating the half-life of the neutrinoless $\beta\beta$ decay ($0\nu\beta\beta$) of $^{150}$Nd. The present results thus provide useful information on the neutrino responses for evaluating the $0\nu\beta\beta$ and $2\nu\beta\beta$ matrix elements. The $2\nu\beta\beta$ matrix element calculated from the Gamow-Teller transitions through the lowest $1^{+}$ state in the intermediate nucleus is maximally about half of that deduced from the half-life measured in $2\nu\beta\beta$ direct counting experiments and at least several transitions through $1^{+}$ intermediate states in $^{150}$Pm are required to explain the $2\nu\beta\beta$ half-life. Because Gamow-Teller transitions in the $^{150}$Sm($t$,$^3$He) experiment are strongly Pauli-blocked, the extraction of Gamow-Teller strengths was complicated by the excitation of the $2\hbar\omega$, $\Delta L=0$, $\Delta S=1$ isovector spin-flip giant monopole resonance (IVSGMR). However, the near absence of Gamow-Teller transition strength made it possible to cleanly identify this resonance, and the strength observed is consistent with the full exhaustion of the non-energy-weighted sum rule for the IVSGMR. Comment: 18 pages, 13 figures, 2 tables |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevC.83.064318 |
| URL الوصول: | http://arxiv.org/abs/1105.0677 |
| رقم الأكسشن: | edsarx.1105.0677 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevC.83.064318 |
|---|