Unexpected distribution of ν1f7/2 strength in Ca 49

H. L. Crawford; A. O. Macchiavelli; P. Fallon; M. Albers; V. M. Bader; D. Bazin; C. M. Campbell; R. M. Clark; M. Cromaz; J. Dilling; A. Gade; A. Gallant; J. D. Holt; R. V.F. Janssens; R. Krücken; C. Langer; T. Lauritsen; I. Y. Lee; J. Menéndez; S. Noji; S. Paschalis; F. Recchia; J. Rissanen; A. Schwenk; M. Scott; J. Simonis; S. R. Stroberg; J. A. Tostevin; C. Walz; D. Weisshaar; A. Wiens; K. Wimmer; S. Zhu

doi:10.1103/PhysRevC.95.064317

Unexpected distribution of ν1f7/2 strength in Ca 49

H. L. Crawford, A. O. Macchiavelli, P. Fallon, M. Albers, V. M. Bader, D. Bazin, C. M. Campbell, R. M. Clark, M. Cromaz, J. Dilling, A. Gade, A. Gallant, J. D. Holt, R. V.F. Janssens, R. Krücken, C. Langer, T. Lauritsen, I. Y. Lee, J. Menéndez, S. NojiS. Paschalis, F. Recchia, J. Rissanen, A. Schwenk, M. Scott, J. Simonis, S. R. Stroberg, J. A. Tostevin, C. Walz, D. Weisshaar, A. Wiens, K. Wimmer, S. Zhu

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

The calcium isotopes have emerged as a critical testing ground for new microscopically derived shell-model interactions, and a great deal of experimental and theoretical focus has been directed toward this region. We investigate the relative spectroscopic strengths associated with 1f7/2 neutron hole states in Ca47,49 following one-neutron knockout reactions from Ca48,50. The observed reduction of strength populating the 7/21- state in Ca49, as compared to Ca47, is inconsistent with shell-model calculations using both phenomenological interactions such as GXPF1, and interactions derived from microscopically based two- and three-nucleon forces. The result suggests a fragmentation of the l=3 strength to higher-lying states as suggested by the microscopic calculations, but the observed magnitude of the reduction is not reproduced in any shell-model description.

Original language	English
Journal	Physical Review C
Volume	95
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevC.95.064317
State	Published - Jun 21 2017
Externally published	Yes

Funding

The authors thank the operations team at NSCL for their work in beam delivery during the experiment. This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Contracts No. DE-AC02-05CH11231 (LBNL) and No. DE-AC02-06CH11357 (ANL), by the Department of Energy National Nuclear Security Administration under Grant No. DE-NA0000979, the National Science Foundation (NSF) under Grant No. PHY1102511, the European Research Council under Grant No. 307986 STRONGINT, and the BMBF under Contract No. 05P15RDFN1. H.L.C. also acknowledges the U.S. DOE under Grant No. DE-FG02-88ER40387 (OH). J.A.T. acknowledges the support of the United Kingdom Science and Technology Facilities Council (STFC) under Grant No. ST/L005743/1. J.M. was supported by an International Research Fellowship from JSPS, and Grant-in-Aid for Scientific Research No. 26.04323. GRETINA was funded by the U.S. DOE Office of Science. Operation of the array at NSCL is supported by NSF under Cooperative Agreement PHY11-02511 (NSCL) and DOE under Grant No. DE-AC02-05CH11231 (LBNL). Computations were performed with computing resources at the Julich Supercomputing Center.

Access to Document

10.1103/PhysRevC.95.064317

Cite this

Crawford, H. L., Macchiavelli, A. O., Fallon, P., Albers, M., Bader, V. M., Bazin, D., Campbell, C. M., Clark, R. M., Cromaz, M., Dilling, J., Gade, A., Gallant, A., Holt, J. D., Janssens, R. V. F., Krücken, R., Langer, C., Lauritsen, T., Lee, I. Y., Menéndez, J., ... Zhu, S. (2017). Unexpected distribution of ν1f7/2 strength in Ca 49. Physical Review C, 95(6). https://doi.org/10.1103/PhysRevC.95.064317

@article{a8a2fcf59ab2457593de9d9082bb9101,

title = "Unexpected distribution of ν1f7/2 strength in Ca 49",

abstract = "The calcium isotopes have emerged as a critical testing ground for new microscopically derived shell-model interactions, and a great deal of experimental and theoretical focus has been directed toward this region. We investigate the relative spectroscopic strengths associated with 1f7/2 neutron hole states in Ca47,49 following one-neutron knockout reactions from Ca48,50. The observed reduction of strength populating the 7/21- state in Ca49, as compared to Ca47, is inconsistent with shell-model calculations using both phenomenological interactions such as GXPF1, and interactions derived from microscopically based two- and three-nucleon forces. The result suggests a fragmentation of the l=3 strength to higher-lying states as suggested by the microscopic calculations, but the observed magnitude of the reduction is not reproduced in any shell-model description.",

author = "Crawford, {H. L.} and Macchiavelli, {A. O.} and P. Fallon and M. Albers and Bader, {V. M.} and D. Bazin and Campbell, {C. M.} and Clark, {R. M.} and M. Cromaz and J. Dilling and A. Gade and A. Gallant and Holt, {J. D.} and Janssens, {R. V.F.} and R. Kr{\"u}cken and C. Langer and T. Lauritsen and Lee, {I. Y.} and J. Men{\'e}ndez and S. Noji and S. Paschalis and F. Recchia and J. Rissanen and A. Schwenk and M. Scott and J. Simonis and Stroberg, {S. R.} and Tostevin, {J. A.} and C. Walz and D. Weisshaar and A. Wiens and K. Wimmer and S. Zhu",

note = "Publisher Copyright: {\textcopyright} 2017 American Physical Society.",

year = "2017",

month = jun,

day = "21",

doi = "10.1103/PhysRevC.95.064317",

language = "English",

volume = "95",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "6",

}

Crawford, HL, Macchiavelli, AO, Fallon, P, Albers, M, Bader, VM, Bazin, D, Campbell, CM, Clark, RM, Cromaz, M, Dilling, J, Gade, A, Gallant, A, Holt, JD, Janssens, RVF, Krücken, R, Langer, C, Lauritsen, T, Lee, IY, Menéndez, J, Noji, S, Paschalis, S, Recchia, F, Rissanen, J, Schwenk, A, Scott, M, Simonis, J, Stroberg, SR, Tostevin, JA, Walz, C, Weisshaar, D, Wiens, A, Wimmer, K & Zhu, S 2017, 'Unexpected distribution of ν1f7/2 strength in Ca 49', Physical Review C, vol. 95, no. 6. https://doi.org/10.1103/PhysRevC.95.064317

TY - JOUR

T1 - Unexpected distribution of ν1f7/2 strength in Ca 49

AU - Crawford, H. L.

AU - Macchiavelli, A. O.

AU - Fallon, P.

AU - Albers, M.

AU - Bader, V. M.

AU - Bazin, D.

AU - Campbell, C. M.

AU - Clark, R. M.

AU - Cromaz, M.

AU - Dilling, J.

AU - Gade, A.

AU - Gallant, A.

AU - Holt, J. D.

AU - Janssens, R. V.F.

AU - Krücken, R.

AU - Langer, C.

AU - Lauritsen, T.

AU - Lee, I. Y.

AU - Menéndez, J.

AU - Noji, S.

AU - Paschalis, S.

AU - Recchia, F.

AU - Rissanen, J.

AU - Schwenk, A.

AU - Scott, M.

AU - Simonis, J.

AU - Stroberg, S. R.

AU - Tostevin, J. A.

AU - Walz, C.

AU - Weisshaar, D.

AU - Wiens, A.

AU - Wimmer, K.

AU - Zhu, S.

PY - 2017/6/21

Y1 - 2017/6/21

N2 - The calcium isotopes have emerged as a critical testing ground for new microscopically derived shell-model interactions, and a great deal of experimental and theoretical focus has been directed toward this region. We investigate the relative spectroscopic strengths associated with 1f7/2 neutron hole states in Ca47,49 following one-neutron knockout reactions from Ca48,50. The observed reduction of strength populating the 7/21- state in Ca49, as compared to Ca47, is inconsistent with shell-model calculations using both phenomenological interactions such as GXPF1, and interactions derived from microscopically based two- and three-nucleon forces. The result suggests a fragmentation of the l=3 strength to higher-lying states as suggested by the microscopic calculations, but the observed magnitude of the reduction is not reproduced in any shell-model description.

AB - The calcium isotopes have emerged as a critical testing ground for new microscopically derived shell-model interactions, and a great deal of experimental and theoretical focus has been directed toward this region. We investigate the relative spectroscopic strengths associated with 1f7/2 neutron hole states in Ca47,49 following one-neutron knockout reactions from Ca48,50. The observed reduction of strength populating the 7/21- state in Ca49, as compared to Ca47, is inconsistent with shell-model calculations using both phenomenological interactions such as GXPF1, and interactions derived from microscopically based two- and three-nucleon forces. The result suggests a fragmentation of the l=3 strength to higher-lying states as suggested by the microscopic calculations, but the observed magnitude of the reduction is not reproduced in any shell-model description.

UR - http://www.scopus.com/inward/record.url?scp=85021064573&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.95.064317

DO - 10.1103/PhysRevC.95.064317

M3 - Article

AN - SCOPUS:85021064573

SN - 2469-9985

VL - 95

JO - Physical Review C

JF - Physical Review C

IS - 6

ER -

Unexpected distribution of ν1f7/2 strength in Ca 49

Abstract

Funding

Access to Document

Other files and links

Fingerprint

Cite this