High-spin octupole yrast levels in {sup 216}Rn{sub 86}

doi:10.1103/PhysRevC.73.024314

Title: High-spin octupole yrast levels in {sup 216}Rn{sub 86}

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Abstract

The yrast level structure of {sup 216}Rn has been studied using in-beam spectroscopy {alpha}-{gamma}-{gamma} coincidence techniques through the {sup 208}Pb({sup 18}O, 2{alpha}2n) reaction in the 91-93 MeV energy range, using the 8{pi} GASP-ISIS spectrometer at Legnaro. The level scheme of {sup 216}Rn resulting from this study shows alternating parity bands only above a certain excitation energy. From this result, the lightest nucleus showing evidence of octupole collectivity at low spins is still {sup 216}Fr, thereby defining the lowest-mass corner for this kind of phenomenon as N{>=}129 and Z{>=}87.

Authors:

Debray, M.E. ^[1]; Escuela de Ciencia y Tecnologia, Universidad de San Martin ^[2]; Davidson, J.; Davidson, M. ^[3]; Kreiner, A. J.; Cardona, M. A. ^[1]; Escuela de Ciencia y Tecnologia, Universidad de San Martin ^[2]; CONICET, 1033 Buenos Aires ^[2]; Hojman, D. ^[1]; CONICET, 1033 Buenos Aires ^[2]; Napoli, D.R.; De Angelis, G.; De Poli, M.; Gadea, A. ^[4]; Lenzi, S.; Bazzacco, D.; Lunardi, S.; Rossi-Alvarez, C.; Ur, C.A. ^[5]; Medina, N. ^[6]

Departamento de Fisica, Comision Nacional de Energia Atomica, 1429 Buenos Aires (Argentina)
(Argentina)
CONICET, 1033 Buenos Aires (Argentina)
INFN, Laboratori Nazionali di Legnaro, Legnaro (Italy)
Dipartimento di Fisica, Sezione di Padova, Padova (Italy)
Departamento de Fisica Nuclear, Universidade de Sao Paulo (Brazil)

Publication Date:: Wed Feb 15 00:00:00 EST 2006

OSTI Identifier:: 20771265

Resource Type:: Journal Article

Resource Relation:: Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 73; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevC.73.024314; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; EXCITATION; FRANCIUM 216; IN-BEAM SPECTROSCOPY; LEAD 208 TARGET; MEV RANGE; NUCLEAR STRUCTURE; OCTUPOLES; OXYGEN 18 REACTIONS; PARITY; RADON 216; SPIN; YRAST STATES

Citation Formats


                    Debray, M.E., Escuela de Ciencia y Tecnologia, Universidad de San Martin, Davidson, J., Davidson, M., Kreiner, A. J., Cardona, M. A., Escuela de Ciencia y Tecnologia, Universidad de San Martin, CONICET, 1033 Buenos Aires, Hojman, D., CONICET, 1033 Buenos Aires, Napoli, D.R., De Angelis, G., De Poli, M., Gadea, A., Lenzi, S., Bazzacco, D., Lunardi, S., Rossi-Alvarez, C., Ur, C.A., and Medina, N. High-spin octupole yrast levels in {sup 216}Rn{sub 86}.  United States: N. p., 2006. 
        Web.  doi:10.1103/PhysRevC.73.024314.

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                    Debray, M.E., Escuela de Ciencia y Tecnologia, Universidad de San Martin, Davidson, J., Davidson, M., Kreiner, A. J., Cardona, M. A., Escuela de Ciencia y Tecnologia, Universidad de San Martin, CONICET, 1033 Buenos Aires, Hojman, D., CONICET, 1033 Buenos Aires, Napoli, D.R., De Angelis, G., De Poli, M., Gadea, A., Lenzi, S., Bazzacco, D., Lunardi, S., Rossi-Alvarez, C., Ur, C.A., & Medina, N. High-spin octupole yrast levels in {sup 216}Rn{sub 86}.  United States.  doi:10.1103/PhysRevC.73.024314.

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                    Debray, M.E., Escuela de Ciencia y Tecnologia, Universidad de San Martin, Davidson, J., Davidson, M., Kreiner, A. J., Cardona, M. A., Escuela de Ciencia y Tecnologia, Universidad de San Martin, CONICET, 1033 Buenos Aires, Hojman, D., CONICET, 1033 Buenos Aires, Napoli, D.R., De Angelis, G., De Poli, M., Gadea, A., Lenzi, S., Bazzacco, D., Lunardi, S., Rossi-Alvarez, C., Ur, C.A., and Medina, N. Wed .  
        "High-spin octupole yrast levels in {sup 216}Rn{sub 86}".  United States.  
        doi:10.1103/PhysRevC.73.024314.

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@article{osti_20771265,

  title        = {High-spin octupole yrast levels in {sup 216}Rn{sub 86}},

  author       = {Debray, M.E. and Escuela de Ciencia y Tecnologia, Universidad de San Martin and Davidson, J. and Davidson, M. and Kreiner, A. J. and Cardona, M. A. and Escuela de Ciencia y Tecnologia, Universidad de San Martin and CONICET, 1033 Buenos Aires and Hojman, D. and CONICET, 1033 Buenos Aires and Napoli, D.R. and De Angelis, G. and De Poli, M. and Gadea, A. and Lenzi, S. and Bazzacco, D. and Lunardi, S. and Rossi-Alvarez, C. and Ur, C.A. and Medina, N.},

  abstractNote = {The yrast level structure of {sup 216}Rn has been studied using in-beam spectroscopy {alpha}-{gamma}-{gamma} coincidence techniques through the {sup 208}Pb({sup 18}O, 2{alpha}2n) reaction in the 91-93 MeV energy range, using the 8{pi} GASP-ISIS spectrometer at Legnaro. The level scheme of {sup 216}Rn resulting from this study shows alternating parity bands only above a certain excitation energy. From this result, the lightest nucleus showing evidence of octupole collectivity at low spins is still {sup 216}Fr, thereby defining the lowest-mass corner for this kind of phenomenon as N{>=}129 and Z{>=}87.},

  doi          = {10.1103/PhysRevC.73.024314},

  journal      = {Physical Review. C, Nuclear Physics},

  number       = 2,

  volume       = 73,

  place        = {United States},

  year         = {Wed Feb 15 00:00:00 EST 2006},

  month        = {Wed Feb 15 00:00:00 EST 2006}

}

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DOI: 10.1103/PhysRevC.73.024314

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