Abstract
We present a study on the β decays of the neutron-rich isotopes 37Al and 38Al, produced by projectile fragmentation of a 48Ca beam with an energy E = 345 A MeV at the RIKEN Nishina Center. The half-lives of 37Al and 38Al have been measured to 11.5(4)ms and 9.0(7)ms, respectively, using the CAITEN implantation and decay detector setup. The level schemes for 37Si and 38Si were deduced by employing γ-γ coincidence spectroscopy following the event-by-event identification of the implanted nuclei. Comparison to large scale nuclear shell model calculations allowed for a tentative assignment of spin and parity of the populated states. The data indicate that the classical shell gap at magic neutron number N = 28 between the νf 7/2 and νp 3/2 orbits gets reduced by 0.3 MeV in this region leading to low-energy states with intruder configuration in 37Si.
Article PDF
Similar content being viewed by others
Explore related subjects
Discover the latest articles, news and stories from top researchers in related subjects.Avoid common mistakes on your manuscript.
References
T. Otsuka, T. Suzuki, R. Fujimoto, H. Grawe, Y. Akaishi, Phys. Rev. Lett. 95, 232502 (2005).
T. Otsuka, T. Suzuki, M. Honma, Y. Utsuno, N. Tsunoda, K. Tsukiyama, M. Hjorth-Jensen, Phys. Rev. Lett. 104, 012501 (2010).
R.W. Ibbotson, T. Glasmacher, B.A. Brown, L. Chen, M.J. Chromik, P.D. Cottle, M. Fauerbach, K.W. Kemper, D.J. Morrissey, H. Scheit, M. Thoennessen, Phys. Rev. Lett. 80, 2081 (1998).
J. Enders, A. Bauer, D. Bazin, A. Bonaccorso, B.A. Brown, T. Glasmacher, P.G. Hansen, V. Maddalena, K.L. Miller, A. Navin, B.M. Sherrill, J.A. Tostevin, Phys. Rev. C 65, 034318 (2002).
D. Sohler, S. Grévy, Z. Dombrádi, O. Sorlin, L. Gaudefroy, B. Bastin, N. Achouri, J. Angélique, F. Azaiez, D. Baiborodin, R. Borcea, C. Bourgeois, A. Buta, A. Burger, L. Caceres, R. Chapman, J. Dalouzy, Z. Dlouhy, A. Drouard, Z. Elekes, S. Franchoo, S. Iacob, I. Kuti, B. Laurent, M. Lazar, X. Liang, E. Liénard, S. Lukyanov, J. Mrazek, L. Nalpas, F. Negoita, F. Nowacki, N. Orr, Y. Penionzkhevitch, Z. Podolyák, F. Pougheon, A. Poves, P. Roussel-Chomaz, M. Stanoiu, I. Stefan, M. St-Laurent, Phys. Lett. B 703, 417 (2011).
F. Rotaru, F. Negoita, S. Grévy, J. Mrazek, S. Lukyanov, F. Nowacki, A. Poves, O. Sorlin, C. Borcea, R. Borcea, A. Buta, L. Cáceres, S. Calinescu, R. Chevrier, Z. Dombrádi, J.M. Daugas, D. Lebhertz, Y. Penionzhkevich, C. Petrone, D. Sohler, M. Stanoiu, J.C. Thomas, Phys. Rev. Lett. 109, 092503 (2012).
G. Burgunder, O. Sorlin, F. Nowacki, S. Giron, F. Hammache, M. Moukaddam, N. de Séréville, D. Beaumel, L. Càceres, E. Clément, G. Duchêne, J.P. Ebran, B. Fernandez-Dominguez, F. Flavigny, S. Franchoo, J. Gibelin, A. Gillibert, S. Grévy, J. Guillot, A. Lepailleur, I. Matea, A. Matta, L. Nalpas, A. Obertelli, T. Otsuka, J. Pancin, A. Poves, R. Raabe, J.A. Scarpaci, I. Stefan, C. Stodel, T. Suzuki, J.C. Thomas, Phys. Rev. Lett. 112, 042502 (2014).
S. Nummela, P. Baumann, E. Caurier, P. Dessagne, A. Jokinen, A. Knipper, G. Le Scornet, C. Miehé, F. Nowacki, M. Oinonen, Z. Radivojevic, M. Ramdhane, G. Walter, J. Äystö, Phys. Rev. C 63, 044316 (2001).
B. Bastin, S. Grévy, D. Sohler, O. Sorlin, Z. Dombrádi, N.L. Achouri, J.C. Angélique, F. Azaiez, D. Baiborodin, R. Borcea, C. Bourgeois, A. Buta, A. Bürger, R. Chapman, J.C. Dalouzy, Z. Dlouhy, A. Drouard, Z. Elekes, S. Franchoo, S. Iacob, B. Laurent, M. Lazar, X. Liang, E. Liénard, J. Mrazek, L. Nalpas, F. Negoita, N.A. Orr, Y. Penionzhkevich, Z. Podolyák, F. Pougheon, P. Roussel-Chomaz, M.G. Saint-Laurent, M. Stanoiu, I. Stefan, F. Nowacki, A. Poves, Phys. Rev. Lett. 99, 022503 (2007).
S. Takeuchi, M. Matsushita, N. Aoi, P. Doornenbal, K. Li, T. Motobayashi, H. Scheit, D. Steppenbeck, H. Wang, H. Baba, D. Bazin, L. Càceres, H. Crawford, P. Fallon, R. Gernhäuser, J. Gibelin, S. Go, S. Grévy, C. Hinke, C.R. Hoffman, R. Hughes, E. Ideguchi, D. Jenkins, N. Kobayashi, Y. Kondo, R. Krücken, T. Le Bleis, J. Lee, G. Lee, A. Matta, S. Michimasa, T. Nakamura, S. Ota, M. Petri, T. Sako, H. Sakurai, S. Shimoura, K. Steiger, K. Takahashi, M. Takechi, Y. Togano, R. Winkler, K. Yoneda, Phys. Rev. Lett. 109, 182501 (2012).
Y. Yano, Nucl. Instrum. Methods B 261, 1009 (2007).
T. Kubo, Nucl. Instrum. Methods B 204, 97 (2003).
S. Takeuchi, T. Motobayashi, Y. Togano, M. Matsushita, N. Aoi, K. Demichi, H. Hasegawa, H. Murakami, Nucl. Instrum. Methods A 763, 596 (2014).
S. Takeuchi, N. Aoi, T. Motobayashi, S. Ota, E. Takeshita, H. Suzuki, H. Baba, T. Fukui, Y. Hashimoto, K. Ieki, N. Imai, H. Iwasaki, S. Kanno, Y. Kondo, T. Kubo, K. Kurita, T. Minemura, T. Nakabayashi, T. Nakamura, T. Okumura, T.K. Onishi, H. Sakurai, S. Shimoura, R. Sugou, D. Suzuki, M.K. Suzuki, M. Takashina, M. Tamaki, K. Tanaka, Y. Togano, K. Yamada, Phys. Rev. C 79, 054319 (2009).
S. Nishimura, Progr. Theor. Exp. Phys. 2012, 03C006 (2012).
K. Steiger, S. Nishimura, Z. Li, R. Chen, T. Faestermann, R. Gernhäuser, C. Hinke, R. Krücken, M. Kurata-Nishimura, G. Lorusso, Y. Miyashita, K. Sugimoto, T. Sumikama, H. Watanabe, K. Yoshinaga, PoS Bormio, 032 (2013).
K. Steiger, Ph.D. thesis, Technische Universität München (2013), http://mediatum.ub.tum.de/node?id=1131491.
V. Tripathi, S.L. Tabor, P.F. Mantica, Y. Utsuno, P. Bender, J. Cook, C.R. Hoffman, S. Lee, T. Otsuka, J. Pereira, M. Perry, K. Pepper, J.S. Pinter, J. Stoker, A. Volya, D. Weisshaar, Phys. Rev. C 76, 021301 (2007).
X. Liang, F. Azaiez, R. Chapman, F. Haas, D. Bazzacco, S. Beghini, B.R. Behera, L. Berti, M. Burns, E. Caurier, L. Corradi, D. Curien, A. Deacon, G.d. Angelis, Z. Dombradi, E. Farnea, E. Fioretto, A. Hodsdon, A. Gadea, F. Ibrahim, A. Jungclaus, K. Keyes, A. Latina, S. Lunardi, N. Marginean, R. Menegazzo, G. Montagnoli, D.R. Napoli, F. Nowacki, J. Ollier, A. Papenberg, G. Pollarolo, V.F.E. Pucknell, M.D. Salsac, F. Scarlassara, J.F. Smith, K. Spohr, M. Stanoiu, A.M. Stefanini, S. Szilner, N. Toniolo, M. Trotta, D. Verney, Z. Wang, J. Wrzesinski, Phys. Rev. C 74, 014311 (2006).
M. Wang, G. Audi, A. Wapstra, F. Kondev, M. MacCormick, X. Xu, B. Pfeiffer, Chin. Phys. C 36, 1603 (2012).
S. Grévy, J.C. Angélique, P. Baumann, C. Borcea, A. Buta, G. Canchel, W.N. Catford, S. Courtin, J.M. Daugas, F. de Oliveira, P. Dessagne, Z. Dlouhy, A. Knipper, K.L. Kratz, F.R. Lecolley, J.L. Lecouey, G. Lehrsenneau, M. Lewitowicz, E. Liénard, S. Lukyanov, F. Maréchal, C. Miehé, J. Mrazek, F. Negoita, N.A. Orr, D. Pantelica, Y. Penionzhkevich, J. Péter, B. Pfeiffer, S. Pietri, E. Poirier, O. Sorlin, M. Stanoiu, I. Stefan, C. Stodel, C. Timis, Phys. Lett. B 594, 252 (2004).
P. Möller, J. Nix, K.L. Kratz, At. Data Nucl. Data Tables 66, 131 (1997).
C. Campbell, N. Aoi, D. Bazin, M. Bowen, B. Brown, J. Cook, D.C. Dinca, A. Gade, T. Glasmacher, M. Horoi, S. Kanno, T. Motobayashi, L. Riley, H. Sagawa, H. Sakurai, K. Starosta, H. Suzuki, S. Takeuchi, J. Terry, K. Yoneda, H. Zwahlen, Phys. Lett. B 652, 169 (2007).
Y. Utsuno, T. Otsuka, B.A. Brown, M. Honma, T. Mizusaki, N. Shimizu, Phys. Rev. C 86, 051301 (2012).
R.W. Ibbotson, T. Glasmacher, P.F. Mantica, H. Scheit, Phys. Rev. C 59, 642 (1999).
S.R. Stroberg, A. Gade, J.A. Tostevin, V.M. Bader, T. Baugher, D. Bazin, J.S. Berryman, B.A. Brown, C.M. Campbell, K.W. Kemper, C. Langer, E. Lunderberg, A. Lemasson, S. Noji, F. Recchia, C. Walz, D. Weisshaar, S.J. Williams, Phys. Rev. C 90, 034301 (2014).
F. Nowacki, A. Poves, Phys. Rev. C 79, 014310 (2009).
Author information
Authors and Affiliations
Corresponding author
Additional information
Communicated by Tohru Motobayashi
Rights and permissions
About this article
Cite this article
Steiger, K., Nishimura, S., Li, Z. et al. Nuclear structure of 37, 38Si investigated by decay spectroscopy of 37, 38Al. Eur. Phys. J. A 51, 117 (2015). https://doi.org/10.1140/epja/i2015-15117-9
Received:
Revised:
Accepted:
Published:
DOI: https://doi.org/10.1140/epja/i2015-15117-9