TITLE

In-beam Studies of Proton Emitters using the Recoil-Decay Tagging Method

AUTHOR(S)
Seweryniak, D.; Woods, P. J.; Ressler, J. J.; Davids, C. N.; Heinz, A.; Sonzogni, A. A.; Uusitalo, J.; Walters, W. B.; Caggiano, J. A.; Carpenter, M. P.; Cizewski, J. A.; Davinson, T.; Ding, K. Y.; Fotiades, N.; Garg, U.; Janssens, R. V. F.; Khoo, T.-L.; Kondev, F. G.; Lauritsen, T.
PUB. DATE
June 2000
SOURCE
AIP Conference Proceedings;2000, Vol. 518 Issue 1, p112
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The last five years have witnessed a rapid increase in the volume of data on proton decaying nuclei. The path was led by decay studies with recoil mass separators equipped with double-sided Si strip detectors. The properties of many proton decaying states were deduced, which triggered renewed theoretical interest in the process of proton decay. The decay experiments were closely followed by in-beam 7-ray studies which extended our knowledge of high-spin states of proton emitters. The unparalleled selectivity of the Recoil-Decay Tagging method combined with the high efficiency of large arrays of Ge detectors allowed, despite small cross sections and overwhelming background from strong reaction channels, the observation of excited states in several proton emitters. Recently, in-beam studies of the deformed proton emitters [sup141]Ho and [sup131]Eu have been performed with the GAMMASPHERE array of Ge detectors and the Fragment Mass Analyzer at ATLAS. Evidence was found for rotational bands in [sup141]Ho and [sup131]Eu. The deformations and the single-particle configurations proposed for the proton emitting states from the earlier proton-decay studies were confronted with the assignments deduced based on the in-beam data. It should be noted that the cross section for populating [sup131]Eu is only about 50 nb, and it represents the weakest channel ever studied in an in-beam experiment
ACCESSION #
11816740

 

Related Articles

  • Surrogate Nuclear Reactions using STARS. Bernstein, L. A.; Burke, J. T.; Church, J. A.; Ahle, L.; Cooper, J. R.; Hoffman, R. D.; Punyon, J.; Schiller, A.; Algin, E.; Plettner, C.; Ai, H.; Beausang, C. W.; Casten, R. F.; Hughes, R.; Ricard-McCutchan, E.; Meyer, D.; Ressler, J. J.; Caggiano, J. A.; Zamfir, N. V.; Amro, H. // AIP Conference Proceedings;2005, Vol. 769 Issue 1, p890 

    The results from two surrogate reaction experiments using the STARS (Silicon Telescope Array for Reaction Studies) spectrometer are presented. The surrogate method involves measuring the particle and/or γ-ray decay probabilities of excited nuclei populated via a direct reaction. These...

  • Search For Wobbling Excitations In Hf Nuclei: Are The SD Bands Triaxial? Hartley, D. J.; Djongolov, M. K.; Riedinger, L. L.; Hagemann, G. B.; Janssens, R. V. F.; Kondev, F. G.; Moore, E. F.; Riley, M. A.; Aguilar, A. A.; Bingham, C. R.; Campbell, D. B.; Carpenter, M. P.; Chowdhury, P.; Cromaz, M.; Cullen, D. M.; Danchev, M.; Dracoulis, G. D.; Fallon, P.; Goon, J.; Kaye, R. A. // AIP Conference Proceedings;2005, Vol. 764 Issue 1, p15 

    Two Gammasphere experiments have been performed in order to establish the possible triaxial nature of strongly deformed (SD) bands in 174Hf. A lifetime measurement confirmed the large deformation of the four previously observed bands in this nucleus. In addition, a thin-target, high-statistics...

  • Discrete Linking Transitions For A Superdeformed Band In The A ≈ 80 Region. Chiara, C. J.; Sarantites, D. G.; Montero, M.; O'Brien, J.; Pechenaya, O. L.; Reviol, W.; Clark, R. M.; Fallon, P.; Görgen, A.; Macchiavelli, A. O.; Ward, D.; Satu&lslash;a, W. // AIP Conference Proceedings;2005, Vol. 764 Issue 1, p40 

    The yrast superdeformed (SD) band in 84Zr has been linked to states of normal deformation (ND) by three single-step γ decays. The spins and parity of the SD band were determined through angular distributions of two of these links. The properties of this band and its decay to ND states are...

  • Search For Hyperdeformation In Xe Nuclei. Hansen, C. Rønn; Hagemann, G. B.; Herskind, B.; Jensen, D. R.; Sletten, G.; Wilson, J. N.; Ødegård, S.; Bringel, P.; Engelhardt, C.; Hübel, H.; Neusser, A.; Singh, A. K.; Benzoni, G.; Bracco, A.; Camera, F.; Leoni, S.; Maj, A.; Byrski, Th.; Curien, D.; Bednarczyk, P. // AIP Conference Proceedings;2005, Vol. 764 Issue 1, p46 

    Two experiments to identify hyperdeformation in Xe-nuclei have been made using the reaction 82Se(48Ca,xn)130-xXe, the first one with the EUROBALL-IV array equipped with a BGO calorimeter and the second one with the Gammasphere array. A bombarding energy of 195 MeV was used with the VIVITRON and...

  • Shape Coexistence at the Outer Edges of Stability. Carpenter, Michael P.; Kondev, Filip G.; Janssens, Robert V. F. // AIP Conference Proceedings;2005, Vol. 769 Issue 1, p894 

    A major program of Gammasphere when coupled with the Fragment Mass Analyzer (FMA) has been to study excited states in nuclei beyond the proton drip line. We have recently performed in-beam experiments using Gammasphere + FMA to measure excited states in proton rich Au, Hg, Tl and Pb isotopes....

  • Doorway States As Principal Decay Pathway In 12C(12C,γ) Radiative Capture. Jenkins, D. G.; Fulton, B. R.; Pearson, J.; Lister, C. J.; Carpenter, M. P.; Freeman, S. J.; Hammond, N. J.; Janssens, R. V. F.; Khoo, T. L.; Lauritsen, T.; Wuosmaa, A. H.; Fallon, P.; Görgen, A.; Macchiavelli, A. O.; McMahan, M.; Haas, F. // AIP Conference Proceedings;2005, Vol. 764 Issue 1, p367 

    The heavy-ion radiative capture reaction, 12C(12C,γ), has been investigated at beam energies around 16 MeV. Three different experiments were performed. Capture cross-sections were obtained by measuring fused 24Mg residues using the FMA at ANL. These were found to significantly exceed values...

  • Structure Of Multi-Quasiparticle Isomers In The Region Of 177Lu. Dracoulis, G. D.; Kondev, F. G.; Lane, G. J.; Byrne, A. P.; Kibédi, T.; Ahmad, I.; Carpenter, M. P.; Freeman, S. J.; Janssens, R. V. F.; Hammond, N. J.; Lauritsen, T.; Lister, C. J.; Seweryniak, D.; Mukherjee, G.; Chowdhury, P.; Tandel, S. K. // AIP Conference Proceedings;2005, Vol. 764 Issue 1, p3 

    High-K states in the region of 177Lu have been studied using multi-nucleon transfer reactions with 136Xe beams and Gammasphere. Results include identification of the predicted 5-quasiparticle KÏ€ = 39/2 - isomer in 177Lu, a 7-quasiparticle KÏ€ = 49/2 + isomer in 179Ta with an anomalously...

  • A NEW GENERATION OF GAMMA DETECTORS FOR NUCLEAR PHYSICS. Schwarzschild, Bertram // Physics Today;Oct91, Vol. 44 Issue 10, p21 

    This article reports on the new generation of gamma detectors for nuclear physics being constructed as of 1991. The construction of Gammasphere, an important new photon detector for nuclear physics, began in September 1991, at the Lawrence Berkeley Laboratory. The principal purpose of this...

  • Proton Radioactivity in 117La and γ-spectroscopy of 117La, 117Ba and 151Lu Using RDT Method. Liu, Z.; Seweryniak, D.; Woods, P. J.; Davids, C. N.; Carpenter, M. P.; Davinson, T.; Janssens, R. V. F.; Page, R.; Robinson, A. P.; Shergur, J.; Sinhab, S.; Tang, X. D.; Zhu, S. // AIP Conference Proceedings;11/30/2007, Vol. 961 Issue 1, p34 

    Proton radioactivity of 117La, was measured with much improved statistics, but no evidence is observed for the isomeric proton decay. Prompt γ-rays were identified in proton emitters 117La, 151Lu, and beta-delayed proton precursor 117Ba using recoil decay tagging method by coupling the...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics