☆ 4.5 Article

Resonance states in 27P using Coulomb dissociation and their effect on the stellar reaction 26Si(p,γ) 27P

PHYSICAL REVIEW C (2011)

Journal

PHYSICAL REVIEW C

Volume 84, Issue 3, Pages -

Publisher

AMER PHYSICAL SOC

DOI: 10.1103/PhysRevC.84.035808

Keywords

-

Categories

Physics, Nuclear

Funding

RIKEN
Japan Society for the Promotion of Science for Young Scientists
Research Center for Measurement in Advanced Science at Rikkyo University
Grants-in-Aid for Scientific Research [22340053, 21740212, 22340072, 22740150, 21340053] Funding Source: KAKEN

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Abstract

The stellar reaction Si-26(p,gamma) P-27 was studied in the Coulomb dissociation of P-27. Two known resonance levels in P-27 were excited and a candidate for the third excited state was found in the Si-26 p relative energy spectrum. The E2 resonance strengths omega gamma were obtained to be (6.5 +/- 1.3) x 10(-11), (6.0 +/- 1.1) x 10(-10), and (1.10 +/- 0.27) x 10(-10) MeV. The total (E2 + M1)omega gamma value for the first excited state was evaluated to be 1.9(-1.1)(+1.9) x 10(-9) MeV with the help of the shell model. The error was estimated from the deviation of theoretical predictions with the same shell model from experimental strengths obtained in the present study for P-27 and earlier ones for the mirror nucleus Mg-27. The astrophysical reaction rate for the Si-26(p,gamma) P-27 reaction was also calculated and compared with previous estimations.

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Article Physics, Nuclear

Gamow-Teller decay of 142Te to 142I

B. Moon, C. -b. Moon, A. Odahara, R. Lozeva, S. Nishimura, C. Yuan, F. Browne, P. Doornenbal, G. Lorusso, Z. Patel, S. Rice, L. Sinclair, P. -a. Soderstrom, T. Sumikama, H. Watanabe, J. Wu, Z. Y. Xu, A. Yagi, D. S. Ahn, H. Baba, F. L. Bello Garrote, R. Daido, J. M. Daugas, F. Didierjean, Y. Fang, N. Fukuda, B. Hong, E. Ideguchi, N. Inabe, T. Ishigaki, T. Isobe, H. S. Jung, D. Kameda, I. Kojouharov, T. Komatsubara, T. Kubo, Y. K. Kwon, C. S. Lee, P. Lee, S. Morimoto, D. Murai, M. Niikura, H. Nishibata, I. Nishizuka, H. Sakurai, Y. Shimizu, H. Suzuki, H. Takeda, K. Tshoo, R. Yokoyama

Summary: The beta decay of 142Te90 to 142I89 was investigated for the first time. The parent nucleus was produced by the in-flight fission of a 238U beam with an energy of 345 MeV per nucleon, impinging on a 9Be target at the Radioactive Isotope Beam Factory of RIKEN. Excited states in 142I were established by beta-delayed gamma-ray spectroscopy. The (1+) states in 142I were found to be predominantly formed by a Gamow-Teller transition between a neutron and a proton in specific orbitals.

PHYSICAL REVIEW C (2023)

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Proceedings Paper Physics, Multidisciplinary

HALF-LIFE MEASUREMENT USING IMPLANT-(β - γ) TIME CORRELATIONS IN THE REGION OF NEUTRON-RICH LANTHANIDES

A. Vitez-Sveiczer, S. Kovacs, G. G. Kiss, Y. Saito, A. Tarifeno-Saldivia, M. Pallas, J. L. Tain, L. Dillmann, J. Agramunt, A. Algora, C. Domingo-Pardo, A. Estrade, C. Appleton, J. M. Allmond, P. Aguilera, H. Baba, N. T. Brewer, C. Bruno, R. Caballero-Folch, F. Calvino, P. J. Coleman-Smith, G. Cortes, T. Davinson, N. Fukuda, Z. Ge, S. Go, C. J. Griffin, R. K. Grzywacz, O. Hall, A. Horvath, J. Ha, L. J. Harkness-Brennan, T. Isobe, D. Kahl, T. T. King, A. Korgul, R. Krucken, S. Kubono, M. Labiche, J. Liu, J. Liang, M. Madurga, K. Miernik, F. Molina, A. I. Morales, M. R. Mumpower, E. Nacher, A. Navarro, N. Nepal, S. Nishimura, M. Piersa-Silkowska, V. Phong, B. C. Rasco, B. Rubio, K. P. Rykaczewski, J. Romero-Barrientos, H. Sakurai, L. Sexton, Y. Shimizu, M. Singh, T. Sprouse, T. Sumikama, R. Surman, H. Suzuki, T. N. Szegedi, H. Takeda, A. Tolosa-Delgado, K. Wang, M. Wolinska-Cichocka, P. Woods, R. Yokoyama, Z. Xu

Summary: In this experiment, neutron-rich lanthanides were produced through in-flight fission to measure their half-lives and beta-delayed neutron emission probabilities, which can help constrain r-process abundance calculations. The validation of the results was done using implantation-beta time correlations and gamma-spectroscopic methods, showing comparable uncertainties and mean values within the expected range.

ACTA PHYSICA POLONICA B PROCEEDINGS SUPPLEMENT (2023)

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Proceedings Paper Physics, Multidisciplinary

EXPERIMENTAL LEVEL SCHEME OF 78Cu

L. G. Pedersen, E. Sahin, A. Gorgen, F. L. Bello Garrote, Y. Tsunoda, T. Otsuka, M. Niikura, S. Nishimura, Z. Xu, H. Baba, G. Benzoni, F. Browne, A. M. Bruce, S. Ceruti, F. C. L. Crespi, R. Daido, G. de Angelis, M. -C. Delattre, Zs Dombradi, P. Doornenbal, Y. Fang, S. Franchoo, G. Gey, A. Gottardo, T. Isobe, P. R. John, H. S. Jung, I. Kojouharov, T. Kubo, N. Kurz, I. Kuti, Z. Li, G. Lorusso, I. Matea, K. Matsui, D. Mengoni, T. Miyazaki, V. Modamio, S. Momiyama, A. I. Morales, P. Morfouace, D. R. Napoli, F. Naqvi, H. Nishibata, A. Odahara, R. Orlandi, Z. Patel, S. Rice, H. Sakurai, H. Schaffner, L. Sinclair, P. -A. Soderstrom, D. Sohler, I. G. Stefan, T. Sumikama, D. Suzuki, R. Taniuchi, J. Taprogge, Z. Vajta, J. J. Valiente-Dobon, H. Watanabe, V. Werner, J. Wu, A. Yagi, M. Yalcinkaya, R. Yokoyama, K. Yoshinaga

Summary: Excited states in Cu-78 were observed for the first time following the ss decay of Ni-78 created by in-flight fission of U-238. A level scheme comprising eight excited states with tentative spin assignments for 5 of them was constructed based on the coincidence relationships between the observed gamma-ray transitions. In addition, an isomeric state with a lifetime of 3.8(4) ms was found to decay by internal conversion.

ACTA PHYSICA POLONICA B PROCEEDINGS SUPPLEMENT (2023)

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