PROGRESS IN RESEARCH April 1, 2006 - March 31, 2007 CYCLOTRON INSTITUTE Texas A&M University College Station, Texas PROGRESS IN RESEARCH APRIL 1, 2006 - MARCH 31, 2007 Prepared By The Cyclotron Institute Staff Texas A&M University College Station, TX 77843-3366 Phone: (979) 845-1411 Fax: (979) 845-1899 Web: http://cyclotron.tamu.edu July 2007 TABLE OF CONTENTS Introduction ............................................................................................................................................... ix R.E. Tribble, Director SECTION I: NUCLEAR STRUCTURE, FUNDAMENTAL INTERACTIONS AND ASTROPHYSICS Giant resonances strength in 28Si ........................................................................................................... I-1 D. H. Youngblood, Y. -W. Lui, and H. L. Clark Folding model analysis for 240 MeV 6Li elastic scattering on 28Si and 24Mg ..................................... I-5 X. Chen, Y. -W. Lui, H. L. Clark, Y. Tokimoto, and D. H. Youngblood Study of the 12N(p,γ)13O reaction from a (12N, 13O) proton transfer reaction................................... I-11 A. Banu, T. Al-Abdullah, V. Burjan, F. Carstoiu, C. Fu, C. A. Gagliardi, M. McCleskey, G. Tabacaru, L. Trache, R. E. Tribble, and Y. Zhai Single and double proton emission from the 14O+4He interaction .................................................... I-15 Changbo Fu, V. Z. Goldberg, A. M. Mukhamedzhanov, G. G. Chubarian, G. V. Rogachev, B. Skorodumov, M. McCleskey, Y. Zhai, T. Al-Abdullah, G. Tabacaru, A. Banu, L. Trache, and R. E. Tribble Decay of 10C excited states above the 2p+2α threshold....................................................................... I-17 R. J. Charity1, K. Mercurio, L. G. Sobotka, J. M. Elson, M. Famiano, A. Banu, C. Fu, L. Trache, and R. E. Tribble Characterization of novel square-bordered position-sensitive silicon detectors with a four-corner readout .............................................................................................................................. I-20 A. Banu, Y. Li, M. McCleskey, M. Bullough, S. Walsh, C. A. Gagliardi, L. Trache, R. E. Tribble, and C. Wilburn Elastic scattering of 12N at 12 AMeV on 12C………………………….………………………………I-24 A. Banu, T. Al-Abdullah, C. Fu, C. A. Gagliardi, Y. Li, M. McCleskey, L. Trache, R. E. Tribble, and Y. Zhai Further studies of β-decay of proton-rich nucleus 23Al………………………………………………I-27 Y. Zhai, T. Al-Abdullah, A. Banu, C. Fu, V. Golovko, J. C. Hardy, V. E. Iacob, N. Nica, H. I. Park, L. Trache, and R. E. Tribble i Technique to study β-delayed p-decay of proton-rich nuclei …..……………………………… …..I-29 L. Trache, T. Al-Abdullah, A. Banu, C. Fu, V. Golovko, J.C. Hardy, V.E. Iacob, H.I. Park, G. Tabacaru, R.E. Tribble, Y. Zhai, J. Aysto, A. Saastamoinen, M. A. Bentley, D. Jenkins, T. Davinson, and P. J. Woods Breakup of sd-shell proton-rich nuclei for nuclear astrophysics.…….....…………………………..I-32 A. Banu, L. Trache, R. E. Tribble, Y. Zhai, N. Orr, L. Achouri, B. Laurent, B. Roeder, M. Chartrier, B. Fernandez-Dominguez, S. Paschalis, B. Pietras, W. Catford, N. Patterson, J. Thomas, M. Freer, P. Roussel-Chomaz, L. Gaudefroy, F. Carstoiu, F. Negoita, F. Rotaru, and A. Bonaccorso Determination of the 17F(p,γ)18Ne reaction rate using the neutron transfer reaction 13C(17O,18O)12C ………………………………………………..…..……………………………… …..I-34 T. Al-Abdullah, F. Carstoiu, X. Chen, C. A. Gagliardi, Y.-W. Lui, G. Tabacaru, Y. Tokimoto, L. Trache, R. E. Tribble, and Y. Zhai Study of low-lying resonant states in 16F using an 15O radioactive ion beam………………………I-37 V. Z. Goldberg, D. W. Lee, K. Peräjärvi, J. Powell, J. P. O’Neil, D. M. Moltz, and Joseph Cerny Study of the 20O+p interaction ……………………………… …..……………………………… …..I-38 Changbo Fu, V. Z. Goldberg, G. G. Chubarian, M. McCleskey, Y. Zhai, T. Al-Abdullah, G. Tabacaru, and R. E. Tribble Search for violation of the spin-parity and isospin conservation law in the decay of the 3.56 MeV 0+ level in 6Li…………………………………..……………………………………………I-39 V. Z. Goldberg, J. C. Hardy, A. Mukhamedzhanov, G. Tabacaru, G. Chubarian, R. E. Tribble, G. V. Rogachev, E. Johnson, C. Spitaleri, S. Cherubini, S. Romano, M. Gulino, A. Tumino, R. G. Pizzone, M. La Cognata, L. Lamia, N. Shulgina, and W.H. Trzaska T = 3/2 states in 13C…………………………………….………………………………………………I-40 V. Z. Goldberg, R. E. Tribble, B. B. Skorodumov, G. V. Rogachev, A. Aprahamian, J. J. Kolata, S. Almaraz, H. Amro, L. O. Lamm, M. Quinn, A. Teymurazyan, and A. Woehr Superallowed beta decay.…………………………………………………….……………………….I-42 J. C. Hardy, I. S. Towner, V. E. Iacob, N. Nica, V. Golovko, H. I. Park, J. Goodwin, C. A. Gagkiardi, L. Trache, and R. E. Tribble The status of Vud …………………………………………………………...……………………….…I-46 J. C. Hardy Precise half-life measurements for the superallowed β+ emitter 34Ar and 34Cl……………………I-48 V. E. Iacob, J. C. Hardy,J. F. Brinkley, C. A. Gagliardi, V.E. Mayes, N. Nica, ii M. Sanchez-Vega, G. Tabacaru, L. Trache, and R. E. Tribble Precise β branching ratios in 34Ar from β-γ coincidences .................................................................. I-51 V. E. Iacob, J. C. Hardy, and V. Golovko The Half Life of 10C .............................................................................................................................. I-55 V. E. Iacob, J. C. Hardy, and V. Golovko, J. Goodwin, N. Nica, H. I. Park, L. Trache and R. E. Tribble High precision half-life measurement in 38Ca ..................................................................................... I-58 H. I. Park, J. C. Hardy, V. V. Golovko, V. E. Iacob, N. Nica, A. Banu, L. Trache, R. E. Tribble, and Y. Zhai TRIUMF E-823: Measurements of the 37,38mK half-lives ................................................................... I-59 V. E. Iacob and J. C. Hardy 50 54 JYFLTRAP : QEC-values of the superallowed decays of Mn and Co .......................................... I-61 J. C. Hardy Branching ratios for the beta decay of 21Na ........................................................................................ I-62 V. E. Iacob, J. C. Hardy, C. A. Gagliardi, J. Goodwin, N. Nica, H. I. Park, G. Tabacaru, L. Trache, R. E. Tribble, Y. Zhai and I. S. Towner Tests of internal-conversion theory and efficiency calibration with precise γ- and x-ray spectroscopy: 134Csm, 137Ba, 139La..….....……..………………...……………………………………. .I-66 N. Nica, C. Balonek, J. C. Hardy, V. E. Iacob, J. Goodwin, H. I. Park, W. E. Rockwell and M. B. Trzhaskovskaya Evaluated nuclear structure data file (ENSDF) at Texas A&M: A=140....…………………………I-70 N. Nica, and J. C. Hardy TWIST: measuring the space-time structure of muon decay ……………………………...……....I-72 C. A. Gagliardi, R. E. Tribble, K. Williams and the TWIST Collaboration Spin and low-x physics with STAR at RHIC..………………………………………………………..I-74 J. L. Drachenberg, C. A. Gagliardi, T. W. Henry, M. Sarsour, R. E. Tribble, and the STAR Collaboration Toward understanding relativistic heavy-ion collisions with the STAR detector at RHIC…...…..I-76 M. Cervantes, R. Clarke, M. Codrington, L. Dunkelberger, A. Hamed, S. Mioduszewski, and the STAR Collaboration iii SECTION II: HEAVY ION REACTIONS Alternative mechanisms for heavy element production ………………………………...…….……..II-1 P. K.Sahu, J. B. Natowitz, R. Wada, K. Hagel, T. Materna, Z. Chen, L. Qin, M. Barbui, S. Moretto, D. Fabris, M. Lunardon, M. Morando, G. Nebbia, S. Pesente, V. Rizzi, G. Viesti, V. Bocci, A. Andrighetto, M. Cinausero, G. Prete, Z. Majka, A. Wieloch, and S. Kowalski Z-dependence of isoscaling parameter in central heavy ion collisions at intermediate energy……II-3 Z. Chen, R. Wada, T. Keutgen, K. Hagel, J. Wang, L. May, L. Qin, J. B. Natowitz, T. Materna, S. Kowalski, and P.K. Sahu Dynamical and statistical nature of heavy ion reactions at 47A MeV .............................................II-5 L. J. Qin, R. Wada , K. Hagel , J. B. Natowitz, J. S. Wang, Y. Ma, T. Materna , T. Keutgen, Z. Chen, and P. K Sahu Progress in BRAHMS.............................................................................................................................II-9 K. Hagel, R. Wada, J. B. Natowitz, and the BRAHMS Collaboration N/Z equilibration in deep inelastic collisions......................................................................................II-11 A. L. Keksis, M. Veselsky, G. A. Souliotis, D. V. Shetty, M. Jandel, E. Bell, A. Ruangma, E. M. Winchester, J. Garey, S. Parketon, C. Richers, and S. J. Yennello The fragmentation of quasiprojectiles . ..............................................................................................II-14 A. L. Keksis, M. Veselsky, G. A. Souliotis, D. V. Shetty, M. Jandel, E. Bell, A. Ruangma, E. M. Winchester, J. Garey, S. Parketon, C. Richers, and S. J. Yennello Nucleon transfer calculations using HIPSE model . ..........................................................................II-18 Z. Kohley, D. Lacroix, G. A. Souliotis, A. L. Keksis, B. Stein, D. V. Shetty, S. Soisson, and S. J. Yennello Using light cluster production to determine the density dependence of the nuclear symmetry energy...................................................................................................................................II-21 S. N. Soisson, L. W. Chen, E. Bell, B. A. Li, D. V. Shetty, G. A. Souliotis, A. L. Keksis, S. J. Yennello and the NIMROD Collaboration An update to the dual-axis dual-lateral upgrade to the FAUST detector array . ...........................II-23 S. N. Soisson, B. C. Stein, and S. J. Yennello Comparisons of microscopic calculations with experimental heavy residue distributions