Observation of a (ν72−[514])2 crossing in 180Os

R.M. Lieder; T. Venkova; S. Utzelmann; W. Gast; H. Schnare; K. Spohr; P. Hoernes; A. Georgiev; D. Bazzacco; R. Menegazzo; C. Rossi-Alvarez; G. de Angelis; R. Kaczarowski; T. Rzaca-Urban; T. Morek; G.V. Marti; K.H. Maier; S. Frauendorf

doi:10.1016/S0375-9474(98)00626-5

Observation of a (ν72−[514])2 crossing in 180Os

R.M. Lieder, T. Venkova, S. Utzelmann, W. Gast, H. Schnare, K. Spohr, P. Hoernes, A. Georgiev, D. Bazzacco, R. Menegazzo, C. Rossi-Alvarez, G. de Angelis, R. Kaczarowski, T. Rzaca-Urban, T. Morek, G.V. Marti, K.H. Maier, S. Frauendorf

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Abstract

High-spin states in 180Os have been populated by means of the 150Nd(36S,6n) reaction at 177 MeV and studied with the γ-spectrometers OSIRIS and GASP. Eight known bands have been extended to higher spins and a new strongly coupled band has been discovered. Configuration assignments of the bands have been carried out in the framework of the tilted-axis cranking model utilizing experimental ratios of reduced transition probabilities B(M1)B(E2). The investigation of the alignment behaviour of the bands revealed that besides the well-known first band crossing caused by the alignment of an i132 quasineutron pair, a second band crossing occurs in four of the bands. The crossing frequency is ⩾ 0.38 MeV and the alignment gain is fairly small, ranging between 2 and ⩾4 ℏ;. The crossing can consistently be explained as a two-quasineutron (ν72−[514])2 alignment. This crossing has been observed for the first time.

Original language	English
Pages (from-to)	465-491
Number of pages	27
Journal	Nuclear Physics A
Volume	645
Issue number	4
DOIs	https://doi.org/10.1016/S0375-9474(98)00626-5
Publication status	Published - 25 Jan 1999
Externally published	Yes

Keywords

Nuclear reactions

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Lieder, R. M., Venkova, T., Utzelmann, S., Gast, W., Schnare, H., Spohr, K., Hoernes, P., Georgiev, A., Bazzacco, D., Menegazzo, R., Rossi-Alvarez, C., de Angelis, G., Kaczarowski, R., Rzaca-Urban, T., Morek, T., Marti, G. V., Maier, K. H., & Frauendorf, S. (1999). Observation of a (ν72−[514])2 crossing in 180Os. Nuclear Physics A, 645(4), 465-491. https://doi.org/10.1016/S0375-9474(98)00626-5

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title = "Observation of a (ν72−[514])2 crossing in 180Os",

abstract = "High-spin states in 180Os have been populated by means of the 150Nd(36S,6n) reaction at 177 MeV and studied with the γ-spectrometers OSIRIS and GASP. Eight known bands have been extended to higher spins and a new strongly coupled band has been discovered. Configuration assignments of the bands have been carried out in the framework of the tilted-axis cranking model utilizing experimental ratios of reduced transition probabilities B(M1)B(E2). The investigation of the alignment behaviour of the bands revealed that besides the well-known first band crossing caused by the alignment of an i132 quasineutron pair, a second band crossing occurs in four of the bands. The crossing frequency is ⩾ 0.38 MeV and the alignment gain is fairly small, ranging between 2 and ⩾4 ℏ;. The crossing can consistently be explained as a two-quasineutron (ν72−[514])2 alignment. This crossing has been observed for the first time.",

keywords = "Nuclear reactions",

author = "R.M. Lieder and T. Venkova and S. Utzelmann and W. Gast and H. Schnare and K. Spohr and P. Hoernes and A. Georgiev and D. Bazzacco and R. Menegazzo and C. Rossi-Alvarez and {de Angelis}, G. and R. Kaczarowski and T. Rzaca-Urban and T. Morek and G.V. Marti and K.H. Maier and S. Frauendorf",

year = "1999",

month = jan,

day = "25",

doi = "10.1016/S0375-9474(98)00626-5",

language = "English",

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pages = "465--491",

journal = "Nuclear Physics A",

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Lieder, RM, Venkova, T, Utzelmann, S, Gast, W, Schnare, H, Spohr, K, Hoernes, P, Georgiev, A, Bazzacco, D, Menegazzo, R, Rossi-Alvarez, C, de Angelis, G, Kaczarowski, R, Rzaca-Urban, T, Morek, T, Marti, GV, Maier, KH & Frauendorf, S 1999, 'Observation of a (ν72−[514])2 crossing in 180Os', Nuclear Physics A, vol. 645, no. 4, pp. 465-491. https://doi.org/10.1016/S0375-9474(98)00626-5

TY - JOUR

T1 - Observation of a (ν72−[514])2 crossing in 180Os

AU - Lieder, R.M.

AU - Venkova, T.

AU - Utzelmann, S.

AU - Gast, W.

AU - Schnare, H.

AU - Spohr, K.

AU - Hoernes, P.

AU - Georgiev, A.

AU - Bazzacco, D.

AU - Menegazzo, R.

AU - Rossi-Alvarez, C.

AU - de Angelis, G.

AU - Kaczarowski, R.

AU - Rzaca-Urban, T.

AU - Morek, T.

AU - Marti, G.V.

AU - Maier, K.H.

AU - Frauendorf, S.

PY - 1999/1/25

Y1 - 1999/1/25

N2 - High-spin states in 180Os have been populated by means of the 150Nd(36S,6n) reaction at 177 MeV and studied with the γ-spectrometers OSIRIS and GASP. Eight known bands have been extended to higher spins and a new strongly coupled band has been discovered. Configuration assignments of the bands have been carried out in the framework of the tilted-axis cranking model utilizing experimental ratios of reduced transition probabilities B(M1)B(E2). The investigation of the alignment behaviour of the bands revealed that besides the well-known first band crossing caused by the alignment of an i132 quasineutron pair, a second band crossing occurs in four of the bands. The crossing frequency is ⩾ 0.38 MeV and the alignment gain is fairly small, ranging between 2 and ⩾4 ℏ;. The crossing can consistently be explained as a two-quasineutron (ν72−[514])2 alignment. This crossing has been observed for the first time.

AB - High-spin states in 180Os have been populated by means of the 150Nd(36S,6n) reaction at 177 MeV and studied with the γ-spectrometers OSIRIS and GASP. Eight known bands have been extended to higher spins and a new strongly coupled band has been discovered. Configuration assignments of the bands have been carried out in the framework of the tilted-axis cranking model utilizing experimental ratios of reduced transition probabilities B(M1)B(E2). The investigation of the alignment behaviour of the bands revealed that besides the well-known first band crossing caused by the alignment of an i132 quasineutron pair, a second band crossing occurs in four of the bands. The crossing frequency is ⩾ 0.38 MeV and the alignment gain is fairly small, ranging between 2 and ⩾4 ℏ;. The crossing can consistently be explained as a two-quasineutron (ν72−[514])2 alignment. This crossing has been observed for the first time.

KW - Nuclear reactions

U2 - 10.1016/S0375-9474(98)00626-5

DO - 10.1016/S0375-9474(98)00626-5

M3 - Article

SN - 0375-9474

VL - 645

SP - 465

EP - 491

JO - Nuclear Physics A

JF - Nuclear Physics A

IS - 4

ER -

Observation of a (ν72−[514])2 crossing in 180Os

Abstract

Keywords

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