The population of metastable states as a probe of relativistic-energy fragmentation reactions

Ana M. Denis Bacelar; Alison Bruce; Zs. Podolyak; N. Al-Dahan; M. Gorska; S. Lalkovski; S. Pietri; M.V. Ricciardi; A. Algora; N. Alkhomashi; J. Benlliure; P. Boutachkov; A. Bracco; E. Calore; E. Casarejos; I.J. Cullen; A.Y. Deo; P. Detistov; Zs. Dombradi; C. Domingo-Pardo; M. Doncel; F. Farinon; G.F. Farrelly; H. Geissel; W Gelletly; J. Gerl; N. Goel; J. Grebosz; R. Hoischen; I. Kojouharov; N. Kurz; S. Leoni; F. Molina; D. Montanari; A.I. Morales; A. Musumarra; D.R. Napoli; R. Nicolini; C. Nociforo; A. Prochazka; W. Prokopowicz; P.H. Regan; B. Rubio; D. Rudolph; K.H. Schmidt; H. Schaffner; S.J. Steer; K. Steiger; P. Strmen; T.P.D. Swan

doi:10.1016/j.physletb.2013.05.033

The population of metastable states as a probe of relativistic-energy fragmentation reactions

Ana M. Denis Bacelar, Alison Bruce, Zs. Podolyak, N. Al-Dahan, M. Gorska, S. Lalkovski, S. Pietri, M.V. Ricciardi, A. Algora, N. Alkhomashi, J. Benlliure, P. Boutachkov, A. Bracco, E. Calore, E. Casarejos, I.J. Cullen, A.Y. Deo, P. Detistov, Zs. Dombradi, C. Domingo-PardoM. Doncel, F. Farinon, G.F. Farrelly, H. Geissel, W Gelletly, J. Gerl, N. Goel, J. Grebosz, R. Hoischen, I. Kojouharov, N. Kurz, S. Leoni, F. Molina, D. Montanari, A.I. Morales, A. Musumarra, D.R. Napoli, R. Nicolini, C. Nociforo, A. Prochazka, W. Prokopowicz, P.H. Regan, B. Rubio, D. Rudolph, K.H. Schmidt, H. Schaffner, S.J. Steer, K. Steiger, P. Strmen, T.P.D. Swan

University of Brighton

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

Abstract

Isomeric ratios have been measured for high-spin states in Po84198,200,206,208, At85208,209,210,211, Rn86210,211,212,213,214, Fr87208,211,212,213,214, Ra88210,211,212,214,215, and Ac89215 following the projectile fragmentation of a 1 A GeV 238U beam by a 9Be target at GSI Helmholtzzentrum für Schwerionenforschung. The fragments were separated in the fragment separator (FRS) and identified by means of energy loss and time-of-flight techniques. They were brought to rest at the centre of the RISING gamma-ray detector array and intensities of gamma rays emitted in the decay of isomeric states with half-lives between 100 ns and 40 μs and spin values up to 55/2 ℏ55/2 ℏ were used to obtain the corresponding isomeric ratios. The data are compared to theoretical isomeric ratios calculated in the framework of the abrasion-ablation model. Large experimental enhancements are obtained for high-spin isomers in comparison to expected values.

Original language	English
Pages (from-to)	302-306
Number of pages	5
Journal	Physics Letters B
Volume	723
Issue number	4-5
DOIs	https://doi.org/10.1016/j.physletb.2013.05.033
Publication status	Published - 25 Jun 2013

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Denis Bacelar, A. M., Bruce, A., Podolyak, Z., Al-Dahan, N., Gorska, M., Lalkovski, S., Pietri, S., Ricciardi, M. V., Algora, A., Alkhomashi, N., Benlliure, J., Boutachkov, P., Bracco, A., Calore, E., Casarejos, E., Cullen, I. J., Deo, A. Y., Detistov, P., Dombradi, Z., ... Swan, T. P. D. (2013). The population of metastable states as a probe of relativistic-energy fragmentation reactions. Physics Letters B, 723(4-5), 302-306. https://doi.org/10.1016/j.physletb.2013.05.033

@article{889d532ac73d4486a67bc57202522b11,

title = "The population of metastable states as a probe of relativistic-energy fragmentation reactions",

abstract = "Isomeric ratios have been measured for high-spin states in Po84198,200,206,208, At85208,209,210,211, Rn86210,211,212,213,214, Fr87208,211,212,213,214, Ra88210,211,212,214,215, and Ac89215 following the projectile fragmentation of a 1 A GeV 238U beam by a 9Be target at GSI Helmholtzzentrum f{\"u}r Schwerionenforschung. The fragments were separated in the fragment separator (FRS) and identified by means of energy loss and time-of-flight techniques. They were brought to rest at the centre of the RISING gamma-ray detector array and intensities of gamma rays emitted in the decay of isomeric states with half-lives between 100 ns and 40 μs and spin values up to 55/2 ℏ55/2 ℏ were used to obtain the corresponding isomeric ratios. The data are compared to theoretical isomeric ratios calculated in the framework of the abrasion-ablation model. Large experimental enhancements are obtained for high-spin isomers in comparison to expected values.",

author = "{Denis Bacelar}, {Ana M.} and Alison Bruce and Zs. Podolyak and N. Al-Dahan and M. Gorska and S. Lalkovski and S. Pietri and M.V. Ricciardi and A. Algora and N. Alkhomashi and J. Benlliure and P. Boutachkov and A. Bracco and E. Calore and E. Casarejos and I.J. Cullen and A.Y. Deo and P. Detistov and Zs. Dombradi and C. Domingo-Pardo and M. Doncel and F. Farinon and G.F. Farrelly and H. Geissel and W Gelletly and J. Gerl and N. Goel and J. Grebosz and R. Hoischen and I. Kojouharov and N. Kurz and S. Leoni and F. Molina and D. Montanari and A.I. Morales and A. Musumarra and D.R. Napoli and R. Nicolini and C. Nociforo and A. Prochazka and W. Prokopowicz and P.H. Regan and B. Rubio and D. Rudolph and K.H. Schmidt and H. Schaffner and S.J. Steer and K. Steiger and P. Strmen and T.P.D. Swan",

year = "2013",

month = jun,

day = "25",

doi = "10.1016/j.physletb.2013.05.033",

language = "English",

volume = "723",

pages = "302--306",

journal = "Physics Letters B",

issn = "0370-2693",

number = "4-5",

}

Denis Bacelar, AM, Bruce, A, Podolyak, Z, Al-Dahan, N, Gorska, M, Lalkovski, S, Pietri, S, Ricciardi, MV, Algora, A, Alkhomashi, N, Benlliure, J, Boutachkov, P, Bracco, A, Calore, E, Casarejos, E, Cullen, IJ, Deo, AY, Detistov, P, Dombradi, Z, Domingo-Pardo, C, Doncel, M, Farinon, F, Farrelly, GF, Geissel, H, Gelletly, W, Gerl, J, Goel, N, Grebosz, J, Hoischen, R, Kojouharov, I, Kurz, N, Leoni, S, Molina, F, Montanari, D, Morales, AI, Musumarra, A, Napoli, DR, Nicolini, R, Nociforo, C, Prochazka, A, Prokopowicz, W, Regan, PH, Rubio, B, Rudolph, D, Schmidt, KH, Schaffner, H, Steer, SJ, Steiger, K, Strmen, P & Swan, TPD 2013, 'The population of metastable states as a probe of relativistic-energy fragmentation reactions', Physics Letters B, vol. 723, no. 4-5, pp. 302-306. https://doi.org/10.1016/j.physletb.2013.05.033

TY - JOUR

T1 - The population of metastable states as a probe of relativistic-energy fragmentation reactions

AU - Denis Bacelar, Ana M.

AU - Bruce, Alison

AU - Podolyak, Zs.

AU - Al-Dahan, N.

AU - Gorska, M.

AU - Lalkovski, S.

AU - Pietri, S.

AU - Ricciardi, M.V.

AU - Algora, A.

AU - Alkhomashi, N.

AU - Benlliure, J.

AU - Boutachkov, P.

AU - Bracco, A.

AU - Calore, E.

AU - Casarejos, E.

AU - Cullen, I.J.

AU - Deo, A.Y.

AU - Detistov, P.

AU - Dombradi, Zs.

AU - Domingo-Pardo, C.

AU - Doncel, M.

AU - Farinon, F.

AU - Farrelly, G.F.

AU - Geissel, H.

AU - Gelletly, W

AU - Gerl, J.

AU - Goel, N.

AU - Grebosz, J.

AU - Hoischen, R.

AU - Kojouharov, I.

AU - Kurz, N.

AU - Leoni, S.

AU - Molina, F.

AU - Montanari, D.

AU - Morales, A.I.

AU - Musumarra, A.

AU - Napoli, D.R.

AU - Nicolini, R.

AU - Nociforo, C.

AU - Prochazka, A.

AU - Prokopowicz, W.

AU - Regan, P.H.

AU - Rubio, B.

AU - Rudolph, D.

AU - Schmidt, K.H.

AU - Schaffner, H.

AU - Steer, S.J.

AU - Steiger, K.

AU - Strmen, P.

AU - Swan, T.P.D.

PY - 2013/6/25

Y1 - 2013/6/25

N2 - Isomeric ratios have been measured for high-spin states in Po84198,200,206,208, At85208,209,210,211, Rn86210,211,212,213,214, Fr87208,211,212,213,214, Ra88210,211,212,214,215, and Ac89215 following the projectile fragmentation of a 1 A GeV 238U beam by a 9Be target at GSI Helmholtzzentrum für Schwerionenforschung. The fragments were separated in the fragment separator (FRS) and identified by means of energy loss and time-of-flight techniques. They were brought to rest at the centre of the RISING gamma-ray detector array and intensities of gamma rays emitted in the decay of isomeric states with half-lives between 100 ns and 40 μs and spin values up to 55/2 ℏ55/2 ℏ were used to obtain the corresponding isomeric ratios. The data are compared to theoretical isomeric ratios calculated in the framework of the abrasion-ablation model. Large experimental enhancements are obtained for high-spin isomers in comparison to expected values.

AB - Isomeric ratios have been measured for high-spin states in Po84198,200,206,208, At85208,209,210,211, Rn86210,211,212,213,214, Fr87208,211,212,213,214, Ra88210,211,212,214,215, and Ac89215 following the projectile fragmentation of a 1 A GeV 238U beam by a 9Be target at GSI Helmholtzzentrum für Schwerionenforschung. The fragments were separated in the fragment separator (FRS) and identified by means of energy loss and time-of-flight techniques. They were brought to rest at the centre of the RISING gamma-ray detector array and intensities of gamma rays emitted in the decay of isomeric states with half-lives between 100 ns and 40 μs and spin values up to 55/2 ℏ55/2 ℏ were used to obtain the corresponding isomeric ratios. The data are compared to theoretical isomeric ratios calculated in the framework of the abrasion-ablation model. Large experimental enhancements are obtained for high-spin isomers in comparison to expected values.

U2 - 10.1016/j.physletb.2013.05.033

DO - 10.1016/j.physletb.2013.05.033

M3 - Article

SN - 0370-2693

VL - 723

SP - 302

EP - 306

JO - Physics Letters B

JF - Physics Letters B

IS - 4-5

ER -

The population of metastable states as a probe of relativistic-energy fragmentation reactions

Abstract

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