Excited states in the neutron-deficient nuclei (197,199,201)Rn

K. Andgren; B. Cederwall; J. Uusitalo; A. N. Andreyev; S. J. Freeman; P. T. Greenlees; B. Hadinia; U. Jakobsson; A. Johnson; P. M. Jones; D. T. Joss; S. Juuitinen; R. Julin; S. Ketelhut; A. Khaplanov; M. Leino; M. Nyman; R. D. Page; P. Rahkila; M. Sandzelius; P. Sapple; J. Saren; C. Scholey; J. Simpson; J. Sorri; J. Thomson; R. Wyss

doi:10.1103/PhysRevC.77.054303

Excited states in the neutron-deficient nuclei (197,199,201)Rn

K. Andgren^*, B. Cederwall, J. Uusitalo, A. N. Andreyev, S. J. Freeman, P. T. Greenlees, B. Hadinia, U. Jakobsson, A. Johnson, P. M. Jones, D. T. Joss, S. Juuitinen, R. Julin, S. Ketelhut, A. Khaplanov, M. Leino, M. Nyman, R. D. Page, P. Rahkila, M. SandzeliusP. Sapple, J. Saren, C. Scholey, J. Simpson, J. Sorri, J. Thomson, R. Wyss

^*Corresponding author for this work

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

Abstract

Excited states of the extremely neutron-deficient radon isotopes with N = 111, 113, 115 have been studied for the first time in a series of in-beam experiments performed at the Accelerator Laboratory of the University of Jyvaskyla. The reactions used were: (118)Sn((82)Kr, 3n)(197)Rn, (120)Sn((82)Kr, 3n)(199)Rn, (150)Sm((52)Cr, 3n)(199)Rn, and (122)Sn((82)Kr, 3n)(201)Rn. The gamma rays emitted from excited states in the different isotopes were identified using the recoil-alpha-decay tagging technique. The estimated cross section for the production of (197)Rn(m) was 7(3) nb, which is the lowest cross section reported so far for an in-beam study. The energies of the (17/2(+)) levels built on the isomeric (13/2(+)) states in (197,199,201)Rn indicate a transition from an anharmonic vibrational structure toward a rotational structure at low spins for these nuclei. However, the transition is not as sharp as predicted by theory.

Original language	English
Article number	ARTN 054303
Number of pages	7
Journal	Physical Review C
Volume	77
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevC.77.054303
Publication status	Published - 2 May 2008

Keywords

ISOTOPES
RN-198
ALPHA-DECAY
MEAN-FIELD
EVEN-EVEN NUCLEI
GAMMA-RAY SPECTROSCOPY

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10.1103/PhysRevC.77.054303

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Andgren, K., Cederwall, B., Uusitalo, J., Andreyev, A. N., Freeman, S. J., Greenlees, P. T., Hadinia, B., Jakobsson, U., Johnson, A., Jones, P. M., Joss, D. T., Juuitinen, S., Julin, R., Ketelhut, S., Khaplanov, A., Leino, M., Nyman, M., Page, R. D., Rahkila, P., ... Wyss, R. (2008). Excited states in the neutron-deficient nuclei (197,199,201)Rn. Physical Review C, 77(5), Article ARTN 054303. https://doi.org/10.1103/PhysRevC.77.054303

@article{cd3d140f42a345368781d7536c9e1a70,

title = "Excited states in the neutron-deficient nuclei (197,199,201)Rn",

abstract = "Excited states of the extremely neutron-deficient radon isotopes with N = 111, 113, 115 have been studied for the first time in a series of in-beam experiments performed at the Accelerator Laboratory of the University of Jyvaskyla. The reactions used were: (118)Sn((82)Kr, 3n)(197)Rn, (120)Sn((82)Kr, 3n)(199)Rn, (150)Sm((52)Cr, 3n)(199)Rn, and (122)Sn((82)Kr, 3n)(201)Rn. The gamma rays emitted from excited states in the different isotopes were identified using the recoil-alpha-decay tagging technique. The estimated cross section for the production of (197)Rn(m) was 7(3) nb, which is the lowest cross section reported so far for an in-beam study. The energies of the (17/2(+)) levels built on the isomeric (13/2(+)) states in (197,199,201)Rn indicate a transition from an anharmonic vibrational structure toward a rotational structure at low spins for these nuclei. However, the transition is not as sharp as predicted by theory.",

keywords = "ISOTOPES, RN-198, ALPHA-DECAY, MEAN-FIELD, EVEN-EVEN NUCLEI, GAMMA-RAY SPECTROSCOPY",

author = "K. Andgren and B. Cederwall and J. Uusitalo and Andreyev, {A. N.} and Freeman, {S. J.} and Greenlees, {P. T.} and B. Hadinia and U. Jakobsson and A. Johnson and Jones, {P. M.} and Joss, {D. T.} and S. Juuitinen and R. Julin and S. Ketelhut and A. Khaplanov and M. Leino and M. Nyman and Page, {R. D.} and P. Rahkila and M. Sandzelius and P. Sapple and J. Saren and C. Scholey and J. Simpson and J. Sorri and J. Thomson and R. Wyss",

year = "2008",

month = may,

day = "2",

doi = "10.1103/PhysRevC.77.054303",

language = "English",

volume = "77",

journal = "Physical Review C",

issn = "0556-2813",

publisher = "American Physical Society",

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Andgren, K, Cederwall, B, Uusitalo, J, Andreyev, AN, Freeman, SJ, Greenlees, PT, Hadinia, B, Jakobsson, U, Johnson, A, Jones, PM, Joss, DT, Juuitinen, S, Julin, R, Ketelhut, S, Khaplanov, A, Leino, M, Nyman, M, Page, RD, Rahkila, P, Sandzelius, M, Sapple, P, Saren, J, Scholey, C, Simpson, J, Sorri, J, Thomson, J & Wyss, R 2008, 'Excited states in the neutron-deficient nuclei (197,199,201)Rn', Physical Review C, vol. 77, no. 5, ARTN 054303. https://doi.org/10.1103/PhysRevC.77.054303

TY - JOUR

T1 - Excited states in the neutron-deficient nuclei (197,199,201)Rn

AU - Andgren, K.

AU - Cederwall, B.

AU - Uusitalo, J.

AU - Andreyev, A. N.

AU - Freeman, S. J.

AU - Greenlees, P. T.

AU - Hadinia, B.

AU - Jakobsson, U.

AU - Johnson, A.

AU - Jones, P. M.

AU - Joss, D. T.

AU - Juuitinen, S.

AU - Julin, R.

AU - Ketelhut, S.

AU - Khaplanov, A.

AU - Leino, M.

AU - Nyman, M.

AU - Page, R. D.

AU - Rahkila, P.

AU - Sandzelius, M.

AU - Sapple, P.

AU - Saren, J.

AU - Scholey, C.

AU - Simpson, J.

AU - Sorri, J.

AU - Thomson, J.

AU - Wyss, R.

PY - 2008/5/2

Y1 - 2008/5/2

N2 - Excited states of the extremely neutron-deficient radon isotopes with N = 111, 113, 115 have been studied for the first time in a series of in-beam experiments performed at the Accelerator Laboratory of the University of Jyvaskyla. The reactions used were: (118)Sn((82)Kr, 3n)(197)Rn, (120)Sn((82)Kr, 3n)(199)Rn, (150)Sm((52)Cr, 3n)(199)Rn, and (122)Sn((82)Kr, 3n)(201)Rn. The gamma rays emitted from excited states in the different isotopes were identified using the recoil-alpha-decay tagging technique. The estimated cross section for the production of (197)Rn(m) was 7(3) nb, which is the lowest cross section reported so far for an in-beam study. The energies of the (17/2(+)) levels built on the isomeric (13/2(+)) states in (197,199,201)Rn indicate a transition from an anharmonic vibrational structure toward a rotational structure at low spins for these nuclei. However, the transition is not as sharp as predicted by theory.

AB - Excited states of the extremely neutron-deficient radon isotopes with N = 111, 113, 115 have been studied for the first time in a series of in-beam experiments performed at the Accelerator Laboratory of the University of Jyvaskyla. The reactions used were: (118)Sn((82)Kr, 3n)(197)Rn, (120)Sn((82)Kr, 3n)(199)Rn, (150)Sm((52)Cr, 3n)(199)Rn, and (122)Sn((82)Kr, 3n)(201)Rn. The gamma rays emitted from excited states in the different isotopes were identified using the recoil-alpha-decay tagging technique. The estimated cross section for the production of (197)Rn(m) was 7(3) nb, which is the lowest cross section reported so far for an in-beam study. The energies of the (17/2(+)) levels built on the isomeric (13/2(+)) states in (197,199,201)Rn indicate a transition from an anharmonic vibrational structure toward a rotational structure at low spins for these nuclei. However, the transition is not as sharp as predicted by theory.

KW - ISOTOPES

KW - RN-198

KW - ALPHA-DECAY

KW - MEAN-FIELD

KW - EVEN-EVEN NUCLEI

KW - GAMMA-RAY SPECTROSCOPY

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U2 - 10.1103/PhysRevC.77.054303

DO - 10.1103/PhysRevC.77.054303

M3 - Article

SN - 0556-2813

VL - 77

JO - Physical Review C

JF - Physical Review C

IS - 5

M1 - ARTN 054303

ER -

Excited states in the neutron-deficient nuclei (197,199,201)Rn

Abstract

Keywords

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