Discovery of Ca 60 and Implications for the Stability of Ca 70

O. B. Tarasov; D. S. Ahn; D. Bazin; N. Fukuda; A. Gade; M. Hausmann; N. Inabe; S. Ishikawa; N. Iwasa; K. Kawata; T. Komatsubara; T. Kubo; K. Kusaka; D. J. Morrissey; M. Ohtake; H. Otsu; M. Portillo; T. Sakakibara; H. Sakurai; H. Sato; B. M. Sherrill; Y. Shimizu; A. Stolz; T. Sumikama; H. Suzuki; H. Takeda; M. Thoennessen; H. Ueno; Y. Yanagisawa; K. Yoshida

doi:10.1103/PhysRevLett.121.022501

Discovery of Ca 60 and Implications for the Stability of Ca 70

O. B. Tarasov, D. S. Ahn, D. Bazin, N. Fukuda, A. Gade, M. Hausmann, N. Inabe, S. Ishikawa, N. Iwasa, K. Kawata, T. Komatsubara, T. Kubo, K. Kusaka, D. J. Morrissey, M. Ohtake, H. Otsu, M. Portillo, T. Sakakibara, H. Sakurai, H. SatoB. M. Sherrill, Y. Shimizu, A. Stolz, T. Sumikama, H. Suzuki, H. Takeda, M. Thoennessen, H. Ueno, Y. Yanagisawa, K. Yoshida

SCI - Physics

Research output: Contribution to journal › Article

30 Citations (Scopus)

Abstract

The discovery of the important neutron-rich nucleus Ca402060 and seven others near the limits of nuclear stability is reported from the fragmentation of a 345 MeV/u Zn70 projectile beam on Be9 targets at the radioactive ion-beam factory of the RIKEN Nishina Center. The produced fragments were analyzed and unambiguously identified using the BigRIPS two-stage in-flight separator. The eight new neutron-rich nuclei discovered, P47, S49, Cl52, Ar54, K57, Ca59,60, and Sc62, are the most neutron-rich isotopes of the respective elements. In addition, one event consistent with K59 was registered. The results are compared with the drip lines predicted by a variety of mass models and it is found that the models in best agreement with the observed limits of existence in the explored region tend to predict the even-mass Ca isotopes to be bound out to at least Ca70.

Original language	English
Article number	022501
Journal	Physical review letters
Volume	121
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevLett.121.022501
Publication status	Published - 2018 Jul 11

ASJC Scopus subject areas

Physics and Astronomy(all)

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Tarasov, O. B., Ahn, D. S., Bazin, D., Fukuda, N., Gade, A., Hausmann, M., Inabe, N., Ishikawa, S., Iwasa, N., Kawata, K., Komatsubara, T., Kubo, T., Kusaka, K., Morrissey, D. J., Ohtake, M., Otsu, H., Portillo, M., Sakakibara, T., Sakurai, H., ... Yoshida, K. (2018). Discovery of Ca 60 and Implications for the Stability of Ca 70. Physical review letters, 121(2), [022501]. https://doi.org/10.1103/PhysRevLett.121.022501

Discovery of Ca 60 and Implications for the Stability of Ca 70. / Tarasov, O. B.; Ahn, D. S.; Bazin, D.; Fukuda, N.; Gade, A.; Hausmann, M.; Inabe, N.; Ishikawa, S.; Iwasa, N.; Kawata, K.; Komatsubara, T.; Kubo, T.; Kusaka, K.; Morrissey, D. J.; Ohtake, M.; Otsu, H.; Portillo, M.; Sakakibara, T.; Sakurai, H.; Sato, H.; Sherrill, B. M.; Shimizu, Y.; Stolz, A.; Sumikama, T.; Suzuki, H.; Takeda, H.; Thoennessen, M.; Ueno, H.; Yanagisawa, Y.; Yoshida, K.

In: Physical review letters, Vol. 121, No. 2, 022501, 11.07.2018.

Research output: Contribution to journal › Article

Tarasov, OB, Ahn, DS, Bazin, D, Fukuda, N, Gade, A, Hausmann, M, Inabe, N, Ishikawa, S, Iwasa, N, Kawata, K, Komatsubara, T, Kubo, T, Kusaka, K, Morrissey, DJ, Ohtake, M, Otsu, H, Portillo, M, Sakakibara, T, Sakurai, H, Sato, H, Sherrill, BM, Shimizu, Y, Stolz, A, Sumikama, T, Suzuki, H, Takeda, H, Thoennessen, M, Ueno, H, Yanagisawa, Y & Yoshida, K 2018, 'Discovery of Ca 60 and Implications for the Stability of Ca 70', Physical review letters, vol. 121, no. 2, 022501. https://doi.org/10.1103/PhysRevLett.121.022501

Tarasov, O. B. ; Ahn, D. S. ; Bazin, D. ; Fukuda, N. ; Gade, A. ; Hausmann, M. ; Inabe, N. ; Ishikawa, S. ; Iwasa, N. ; Kawata, K. ; Komatsubara, T. ; Kubo, T. ; Kusaka, K. ; Morrissey, D. J. ; Ohtake, M. ; Otsu, H. ; Portillo, M. ; Sakakibara, T. ; Sakurai, H. ; Sato, H. ; Sherrill, B. M. ; Shimizu, Y. ; Stolz, A. ; Sumikama, T. ; Suzuki, H. ; Takeda, H. ; Thoennessen, M. ; Ueno, H. ; Yanagisawa, Y. ; Yoshida, K. / Discovery of Ca 60 and Implications for the Stability of Ca 70. In: Physical review letters. 2018 ; Vol. 121, No. 2.

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abstract = "The discovery of the important neutron-rich nucleus Ca402060 and seven others near the limits of nuclear stability is reported from the fragmentation of a 345 MeV/u Zn70 projectile beam on Be9 targets at the radioactive ion-beam factory of the RIKEN Nishina Center. The produced fragments were analyzed and unambiguously identified using the BigRIPS two-stage in-flight separator. The eight new neutron-rich nuclei discovered, P47, S49, Cl52, Ar54, K57, Ca59,60, and Sc62, are the most neutron-rich isotopes of the respective elements. In addition, one event consistent with K59 was registered. The results are compared with the drip lines predicted by a variety of mass models and it is found that the models in best agreement with the observed limits of existence in the explored region tend to predict the even-mass Ca isotopes to be bound out to at least Ca70.",

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AU - Sato, H.

AU - Sherrill, B. M.

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AU - Stolz, A.

AU - Sumikama, T.

AU - Suzuki, H.

AU - Takeda, H.

AU - Thoennessen, M.

AU - Ueno, H.

AU - Yanagisawa, Y.

AU - Yoshida, K.

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