D. Steppenbeck
University of Manchester
12 Papers
78 Citations
D. Steppenbeck is an academic researcher from University of Manchester. The author has contributed to research in topics: Neutron & Nuclear reaction. The author has an hindex of 6, co-authored 12 publications. Previous affiliations of D. Steppenbeck include University of Tokyo.
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Papers
Evidence for a new nuclear ‘magic number’ from the level structure of 54 Ca
D. Steppenbeck,Satoshi Takeuchi,Nori Aoi,Pieter Doornenbal,Masafumi Matsushita,Hua-Lei Wang,Hidetada Baba,Naoki Fukuda,Shintaro Go,Michio Honma,Jenny Lee,K. Matsui,Shin'ichiro Michimasa,Tohru Motobayashi,D. Nishimura,Takaharu Otsuka,Hiroyoshi Sakurai,Yoshiaki Shiga,P. A. Söderström,Toshiyuki Sumikama,Hiroshi Suzuki,Ryo Taniuchi,Yutaka Utsuno,J. J. Valiente-Dobón,Kenichiro Yoneda +24 more
TL;DR: A spectroscopic study of the neutron-rich nucleus 54Ca using proton knockout reactions involving fast radioactive projectiles highlights the doubly magic nature of 54Ca and provides direct experimental evidence for the onset of a sizable subshell closure at neutron number 34 in isotopes far from stability.
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Lifetime Measurements of the Neutron-Rich N=30 Isotones Ca-50 and Sc-51: Orbital Dependence of Effective Charges in the fp Shell
J. J. Valiente-Dobón,D. Mengoni,A. Gadea,E. Farnea,S. M. Lenzi,S. Lunardi,A. Dewald,Th. Pissulla,Suzana Szilner,R. Broda,F. Recchia,A. Algora,L. Angus,D. Bazzacco,G. Benzoni,P. G. Bizzeti,A. M. Bizzeti-Sona,P. Boutachkov,L. Corradi,F. C. L. Crespi,G. de Angelis,E. Fioretto,Andreas Görgen,M. Górska,A. Gottardo,E. Grodner,B. Guiot,Andrew W. Howard,W. Królas,S. Leoni,P. J. R. Mason,Roberto Menegazzo,D. Montanari,G. Montagnoli,D. R. Napoli,A. Obertelli,T. Pawłat,B. Rubio,E. Sahin,F. Scarlassara,R. Silvestri,A. M. Stefanini,J. F. Smith,D. Steppenbeck,C. A. Ur,P. T. Wady,J. Wrzesiński,Enrico Maglione,Ikuko Hamamoto +48 more
TL;DR: In this paper, the lifetimes of the first excited states of the N=30 isotones Ca-50 and Sc-51 have been determined using the Recoil Distance Doppler Shift method in combination with the CLARA-PRISMA spectrometers.
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Cross shell excitations near the ?island of inversion?: Structure of Mg-30
A. N. Deacon,J. F. Smith,S. J. Freeman,R. V. F. Janssens,M. P. Carpenter,B. Hadinia,C. R. Hoffman,B. P. Kay,T. Lauritsen,C. J. Lister,David O'Donnell,J. Ollier,Takaharu Otsuka,Takaharu Otsuka,D. Seweryniak,K. M. Spohr,D. Steppenbeck,S. L. Tabor,Vandana Tripathi,Yutaka Utsuno,P. T. Wady,S. Zhu +21 more
TL;DR: In this paper, the authors compared shell-model calculations using the Universal sd effective interaction and the Monte Carlo shell model method to reproduce the observed levels of excitations across the N=20 gap.
Shape coexistence revealed in the $N=Z$ isotope $^{72}$Kr through inelastic scattering
Kathrin Wimmer,Kathrin Wimmer,T. Arici,W. Korten,Pieter Doornenbal,J.-P. Delaroche,Michel Girod,J. Libert,Tomás R. Rodríguez,P. Aguilera,Alejandro Algora,Alejandro Algora,Toshiaki Ando,Hidetada Baba,B. Blank,A. Boso,Suet Nee Chen,A. Corsi,P. J. Davies,G. de Angelis,D. T. Doherty,J. Gerl,R. Gernhäuser,T. Goigoux,D. G. Jenkins,G. Kiss,Shunpei Koyama,Tohru Motobayashi,S. Nagamine,M. Niikura,Shunji Nishimura,Alexandre Obertelli,D. Lubos,V. H. Phong,Berta Rubio,E. Sahin,T. Saito,Hiroyoshi Sakurai,L. Sinclair,D. Steppenbeck,R. Taniuchi,Victor Vaquero,R. Wadsworth,Jin Wu,M. Zielinska +44 more
TL;DR: In this article, the authors used a two-band mixing model and showed clear evidence for a oblate-prolate shape coexistence and can be explained by a shape change from an oblate ground state to prolate deformed yrast band from the first $2^+$ state.
One-particle excitations outside the 54Ti semi-magic core: The 55V and 55Ti yrast structures
S. Zhu,R. V. F. Janssens,B. Fornal,S. J. Freeman,Michio Honma,R. Broda,M. P. Carpenter,Alick Deacon,B. P. Kay,F. G. Kondev,W. Krolas,W. Krolas,J. Kozemczak,A. Larabee,T. Lauritsen,Sean Liddick,C. J. Lister,P. F. Mantica,Taka Otsuka,T. Pawłat,A. Robinson,D. Seweryniak,J. F. Smith,D. Steppenbeck,B. E. Tomlin,J. Wrzesiński,X. Wang,X. Wang +27 more
TL;DR: C. F.Zhu, S. P. Honma, M. J. Janssens, R. V. Fornal, B. Lister, C. Mantica, P. Kondev, F. Otsuka, T. Robinson, A. Seweryniak, D. Smith, J. Steppenbeck,D.
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