gamma-ray spectroscopy approaching the limits of existence of atomic nuclei: a study of the excited states of Pt-168 and Pt-169

M. B. Gomez Hornillos, D. O'Donnell, J. Simpson, D. T. Joss, L. Bianco, B. Cederwall, T. Grahn, P. T. Greenlees, B. Hadinia, P. Jones, R. Julin, S. Juutinen, S. Ketelhut, M. Labiche, M. Leino, M. Nyman, R. D. Page, E. S. Paul, M. Petri, P. Peura & 9 others P. Rahkila, P. Ruotsalainen, M. Sandzelius, P. J. Sapple, J. Saren, C. Scholey, J. Sorri, J. Thomson, J. Uusitalo

Research output: Contribution to journalArticle

Abstract

Excited states in the N=90 and N =91 Pt nuclei have been investigated using the JUROGAM and GREAT spectrometers in conjunction with the RITU gas-filled separator. These nuclei were populated via the reactions 92Mo(78 Kr,2n) and 94Mo (78K,3n) at 335 and 348 MeV, respectively. The recoil-decay tagging technique has been used to correlate prompt γ radiation with the characteristic α decays of 168Pt and 169Pt. A γ−γ analysis has allowed a level scheme for 168Pt to be reported for the first time and the level scheme for 169Pt to be extended. The excitation energies of the proposed positive-parity yrast states of 168Pt are compared with calculations based on the interacting boson model and found to be in excellent agreement. These data show a continuation of the trend toward vibrational nuclei as the N=82 shell gap is approached. In addition, new excited states constituting two decay paths have been discovered in 169Pt .

Original languageEnglish
Article number064314
JournalPhysical Review C
Volume79
Issue number6
DOIs
Publication statusPublished - 15 Jun 2009
Externally publishedYes

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gamma rays
nuclei
decay
spectroscopy
yrast state
excitation
separators
marking
parity
bosons
spectrometers
trends
radiation
gases
energy

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Gomez Hornillos, M. B. ; O'Donnell, D. ; Simpson, J. ; Joss, D. T. ; Bianco, L. ; Cederwall, B. ; Grahn, T. ; Greenlees, P. T. ; Hadinia, B. ; Jones, P. ; Julin, R. ; Juutinen, S. ; Ketelhut, S. ; Labiche, M. ; Leino, M. ; Nyman, M. ; Page, R. D. ; Paul, E. S. ; Petri, M. ; Peura, P. ; Rahkila, P. ; Ruotsalainen, P. ; Sandzelius, M. ; Sapple, P. J. ; Saren, J. ; Scholey, C. ; Sorri, J. ; Thomson, J. ; Uusitalo, J. / gamma-ray spectroscopy approaching the limits of existence of atomic nuclei : a study of the excited states of Pt-168 and Pt-169. In: Physical Review C. 2009 ; Vol. 79, No. 6.
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abstract = "Excited states in the N=90 and N =91 Pt nuclei have been investigated using the JUROGAM and GREAT spectrometers in conjunction with the RITU gas-filled separator. These nuclei were populated via the reactions 92Mo(78 Kr,2n) and 94Mo (78K,3n) at 335 and 348 MeV, respectively. The recoil-decay tagging technique has been used to correlate prompt γ radiation with the characteristic α decays of 168Pt and 169Pt. A γ−γ analysis has allowed a level scheme for 168Pt to be reported for the first time and the level scheme for 169Pt to be extended. The excitation energies of the proposed positive-parity yrast states of 168Pt are compared with calculations based on the interacting boson model and found to be in excellent agreement. These data show a continuation of the trend toward vibrational nuclei as the N=82 shell gap is approached. In addition, new excited states constituting two decay paths have been discovered in 169Pt .",
author = "{Gomez Hornillos}, {M. B.} and D. O'Donnell and J. Simpson and Joss, {D. T.} and L. Bianco and B. Cederwall and T. Grahn and Greenlees, {P. T.} and B. Hadinia and P. Jones and R. Julin and S. Juutinen and S. Ketelhut and M. Labiche and M. Leino and M. Nyman and Page, {R. D.} and Paul, {E. S.} and M. Petri and P. Peura and P. Rahkila and P. Ruotsalainen and M. Sandzelius and Sapple, {P. J.} and J. Saren and C. Scholey and J. Sorri and J. Thomson and J. Uusitalo",
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Gomez Hornillos, MB, O'Donnell, D, Simpson, J, Joss, DT, Bianco, L, Cederwall, B, Grahn, T, Greenlees, PT, Hadinia, B, Jones, P, Julin, R, Juutinen, S, Ketelhut, S, Labiche, M, Leino, M, Nyman, M, Page, RD, Paul, ES, Petri, M, Peura, P, Rahkila, P, Ruotsalainen, P, Sandzelius, M, Sapple, PJ, Saren, J, Scholey, C, Sorri, J, Thomson, J & Uusitalo, J 2009, 'gamma-ray spectroscopy approaching the limits of existence of atomic nuclei: a study of the excited states of Pt-168 and Pt-169' Physical Review C, vol. 79, no. 6, 064314. https://doi.org/10.1103/PhysRevC.79.064314

gamma-ray spectroscopy approaching the limits of existence of atomic nuclei : a study of the excited states of Pt-168 and Pt-169. / Gomez Hornillos, M. B.; O'Donnell, D.; Simpson, J.; Joss, D. T.; Bianco, L.; Cederwall, B.; Grahn, T.; Greenlees, P. T.; Hadinia, B.; Jones, P.; Julin, R.; Juutinen, S.; Ketelhut, S.; Labiche, M.; Leino, M.; Nyman, M.; Page, R. D.; Paul, E. S.; Petri, M.; Peura, P.; Rahkila, P.; Ruotsalainen, P.; Sandzelius, M.; Sapple, P. J.; Saren, J.; Scholey, C.; Sorri, J.; Thomson, J.; Uusitalo, J.

In: Physical Review C, Vol. 79, No. 6, 064314, 15.06.2009.

Research output: Contribution to journalArticle

TY - JOUR

T1 - gamma-ray spectroscopy approaching the limits of existence of atomic nuclei

T2 - a study of the excited states of Pt-168 and Pt-169

AU - Gomez Hornillos, M. B.

AU - O'Donnell, D.

AU - Simpson, J.

AU - Joss, D. T.

AU - Bianco, L.

AU - Cederwall, B.

AU - Grahn, T.

AU - Greenlees, P. T.

AU - Hadinia, B.

AU - Jones, P.

AU - Julin, R.

AU - Juutinen, S.

AU - Ketelhut, S.

AU - Labiche, M.

AU - Leino, M.

AU - Nyman, M.

AU - Page, R. D.

AU - Paul, E. S.

AU - Petri, M.

AU - Peura, P.

AU - Rahkila, P.

AU - Ruotsalainen, P.

AU - Sandzelius, M.

AU - Sapple, P. J.

AU - Saren, J.

AU - Scholey, C.

AU - Sorri, J.

AU - Thomson, J.

AU - Uusitalo, J.

PY - 2009/6/15

Y1 - 2009/6/15

N2 - Excited states in the N=90 and N =91 Pt nuclei have been investigated using the JUROGAM and GREAT spectrometers in conjunction with the RITU gas-filled separator. These nuclei were populated via the reactions 92Mo(78 Kr,2n) and 94Mo (78K,3n) at 335 and 348 MeV, respectively. The recoil-decay tagging technique has been used to correlate prompt γ radiation with the characteristic α decays of 168Pt and 169Pt. A γ−γ analysis has allowed a level scheme for 168Pt to be reported for the first time and the level scheme for 169Pt to be extended. The excitation energies of the proposed positive-parity yrast states of 168Pt are compared with calculations based on the interacting boson model and found to be in excellent agreement. These data show a continuation of the trend toward vibrational nuclei as the N=82 shell gap is approached. In addition, new excited states constituting two decay paths have been discovered in 169Pt .

AB - Excited states in the N=90 and N =91 Pt nuclei have been investigated using the JUROGAM and GREAT spectrometers in conjunction with the RITU gas-filled separator. These nuclei were populated via the reactions 92Mo(78 Kr,2n) and 94Mo (78K,3n) at 335 and 348 MeV, respectively. The recoil-decay tagging technique has been used to correlate prompt γ radiation with the characteristic α decays of 168Pt and 169Pt. A γ−γ analysis has allowed a level scheme for 168Pt to be reported for the first time and the level scheme for 169Pt to be extended. The excitation energies of the proposed positive-parity yrast states of 168Pt are compared with calculations based on the interacting boson model and found to be in excellent agreement. These data show a continuation of the trend toward vibrational nuclei as the N=82 shell gap is approached. In addition, new excited states constituting two decay paths have been discovered in 169Pt .

U2 - 10.1103/PhysRevC.79.064314

DO - 10.1103/PhysRevC.79.064314

M3 - Article

VL - 79

JO - Physical Review C

JF - Physical Review C

SN - 2469-9985

IS - 6

M1 - 064314

ER -