The rotational structure of 227Ra

T. Von Egidy; G. Barreau; H. G. Börner; W. F. Davidson; J. Larysz; D. D. Warner; P. H.M. Van Assche; K. Nybø; T. F. Thorsteinsen; G. Løvhøiden; E. R. Flynn; J. A. Cizewski; R. K. Sheline; D. Decman; D. G. Burke; G. Sletten; N. Kaffrell; W. Kurcewicz; T. Björnstad; G. Nyman

doi:10.1016/0375-9474(81)90386-9

The rotational structure of ²²⁷Ra

T. Von Egidy, G. Barreau, H. G. Börner, W. F. Davidson, J. Larysz, D. D. Warner, P. H.M. Van Assche, K. Nybø, T. F. Thorsteinsen, G. Løvhøiden, E. R. Flynn, J. A. Cizewski, R. K. Sheline, D. Decman, D. G. Burke, G. Sletten, N. Kaffrell, W. Kurcewicz, T. Björnstad, G. Nyman

Research output › peer-review

Abstract

The level structure of ²²⁷Ra has been studied using the (n, γ), (d, p) and (t, d) reactions and the β^- decay of ²²⁷Fr. A model-independent level scheme was established including 28 levels below 1500 keV. Cross sections and excitation energies have been measured for 72 levels below 2.5 MeV and analysing powers have been measured for 25 levels below 1.4 MeV. The level structure is interpreted in terms of the Nilsson model. The ground-state configuration is 3 2⁺[631↑] and the first excited band [633↓] starts at 1.7 keV. Several octupole vibrations coupled to single-particle configurations are tentatively assigned above 280 keV. The neutron binding energy was determined to be 4561.41 ± 0.27 keV. The half-life of ²²⁷Fr was measured to be 148 ± 2 s.

Original language	English
Pages (from-to)	26-60
Number of pages	35
Journal	Nuclear Physics, Section A
Volume	365
Issue number	1
DOIs	https://doi.org/10.1016/0375-9474(81)90386-9
State	Published - 20 Jul 1981

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/0375-9474(81)90386-9

Cite this

Von Egidy, T., Barreau, G., Börner, H. G., Davidson, W. F., Larysz, J., Warner, D. D., Van Assche, P. H. M., Nybø, K., Thorsteinsen, T. F., Løvhøiden, G., Flynn, E. R., Cizewski, J. A., Sheline, R. K., Decman, D., Burke, D. G., Sletten, G., Kaffrell, N., Kurcewicz, W., Björnstad, T., & Nyman, G. (1981). The rotational structure of ²²⁷Ra. Nuclear Physics, Section A, 365(1), 26-60. https://doi.org/10.1016/0375-9474(81)90386-9

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title = "The rotational structure of 227Ra",

abstract = "The level structure of 227Ra has been studied using the (n, γ), (d, p) and (t, d) reactions and the β- decay of 227Fr. A model-independent level scheme was established including 28 levels below 1500 keV. Cross sections and excitation energies have been measured for 72 levels below 2.5 MeV and analysing powers have been measured for 25 levels below 1.4 MeV. The level structure is interpreted in terms of the Nilsson model. The ground-state configuration is 3 2+[631↑] and the first excited band [633↓] starts at 1.7 keV. Several octupole vibrations coupled to single-particle configurations are tentatively assigned above 280 keV. The neutron binding energy was determined to be 4561.41 ± 0.27 keV. The half-life of 227Fr was measured to be 148 ± 2 s.",

keywords = "Nuclear reactions",

author = "{Von Egidy}, T. and G. Barreau and B{\"o}rner, {H. G.} and Davidson, {W. F.} and J. Larysz and Warner, {D. D.} and {Van Assche}, {P. H.M.} and K. Nyb{\o} and Thorsteinsen, {T. F.} and G. L{\o}vh{\o}iden and Flynn, {E. R.} and Cizewski, {J. A.} and Sheline, {R. K.} and D. Decman and Burke, {D. G.} and G. Sletten and N. Kaffrell and W. Kurcewicz and T. Bj{\"o}rnstad and G. Nyman",

year = "1981",

month = jul,

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doi = "10.1016/0375-9474(81)90386-9",

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Von Egidy, T, Barreau, G, Börner, HG, Davidson, WF, Larysz, J, Warner, DD, Van Assche, PHM, Nybø, K, Thorsteinsen, TF, Løvhøiden, G, Flynn, ER, Cizewski, JA, Sheline, RK, Decman, D, Burke, DG, Sletten, G, Kaffrell, N, Kurcewicz, W, Björnstad, T & Nyman, G 1981, 'The rotational structure of ²²⁷Ra', Nuclear Physics, Section A, vol. 365, no. 1, pp. 26-60. https://doi.org/10.1016/0375-9474(81)90386-9

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T1 - The rotational structure of 227Ra

AU - Von Egidy, T.

AU - Barreau, G.

AU - Börner, H. G.

AU - Davidson, W. F.

AU - Larysz, J.

AU - Warner, D. D.

AU - Van Assche, P. H.M.

AU - Nybø, K.

AU - Thorsteinsen, T. F.

AU - Løvhøiden, G.

AU - Flynn, E. R.

AU - Cizewski, J. A.

AU - Sheline, R. K.

AU - Decman, D.

AU - Burke, D. G.

AU - Sletten, G.

AU - Kaffrell, N.

AU - Kurcewicz, W.

AU - Björnstad, T.

AU - Nyman, G.

PY - 1981/7/20

Y1 - 1981/7/20

N2 - The level structure of 227Ra has been studied using the (n, γ), (d, p) and (t, d) reactions and the β- decay of 227Fr. A model-independent level scheme was established including 28 levels below 1500 keV. Cross sections and excitation energies have been measured for 72 levels below 2.5 MeV and analysing powers have been measured for 25 levels below 1.4 MeV. The level structure is interpreted in terms of the Nilsson model. The ground-state configuration is 3 2+[631↑] and the first excited band [633↓] starts at 1.7 keV. Several octupole vibrations coupled to single-particle configurations are tentatively assigned above 280 keV. The neutron binding energy was determined to be 4561.41 ± 0.27 keV. The half-life of 227Fr was measured to be 148 ± 2 s.

AB - The level structure of 227Ra has been studied using the (n, γ), (d, p) and (t, d) reactions and the β- decay of 227Fr. A model-independent level scheme was established including 28 levels below 1500 keV. Cross sections and excitation energies have been measured for 72 levels below 2.5 MeV and analysing powers have been measured for 25 levels below 1.4 MeV. The level structure is interpreted in terms of the Nilsson model. The ground-state configuration is 3 2+[631↑] and the first excited band [633↓] starts at 1.7 keV. Several octupole vibrations coupled to single-particle configurations are tentatively assigned above 280 keV. The neutron binding energy was determined to be 4561.41 ± 0.27 keV. The half-life of 227Fr was measured to be 148 ± 2 s.

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