Cross sections for the two-body channels populated in the 32 S+ 24 Mg reaction at E c . m . =60.8 MeV have been measured by use of a coincidence technique which allows correction for secondary lightparticle evaporation. The data show reaction yields with full equilibration of energy and massasymmetry coordinates. These results suggest an asymmetric fission mechanism and are contrary to what is expected from the previously proposed "orbiting" mechanism in light systems.

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The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing the burden to Department of Defense, Washington Headquarters Services Directorate for Information SPONSORINGIMONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSOR/MONITOR'S ACRONYM(S)AFRL/RVBXR SPONSORMONITOR'S REPORT DISTRIBUTIONAVAILABILITY STATEMENT 20080326019Approved for Public Release; distribution unlimited. SUPPLEMENTARY NOTESReprinted from IEEE Transactions on Nuclear Science, Vol. 54, No. 6, December 2007© 2007 14. ABSTRACT Proton flux anisotropy as a function of altitude in the South Atlantic Anomaly (SAA) is investigated using data from the Compact Environment Sensor (CEASE) flown onboard the Tri-Service Experiment-5 (TSX-5) satellite from June 2000 to July 2006. In a 410 x 1710 kim, 69 degree inclination orbit, TSX-5 spanned a broad range of the low Earth orbit regime. Using measurements of total dose, integral energy flux >40 MeV and the differential flux at 40 MeV sorted into 3 degree latitude x 3 degree longitude x 50 kim altitude bins and averaged over the entire misison, the components arising from eastward and westward traveling protons have been determined in areas of the SAA where CEASE detection efficiency is not compromised. For the first time, ratios of these components have been compared to predictions of East-West effect models above 400 km. There is good agreement in general with the anisotropy becoming apparent at approximately 1200 km (moving down) and increasing rapidly starting at approximately 1000 km, the magnitude and rate depending on location within the anomaly. Measurement of the differential flux at 40 MeV are compared to predictions of standard radiation belt models as a function of altitude and found to be substantially higher in magnitude than AP8, though a comprehensive survey has not yet been performed. SUBJECT TERMS 0x 3 degree longitude x 50 km altitide bins and averaged over Section I reviews the theory and modeling work which has been o the entire mission, the components arising from eastward and done on the EW effect. CEASE data analysis methods are dewestward traveling protons have been determined in areas of the SAA where CEASE detection efficiency is not compromised. For scribed in Section III and the comparison of data to theory is the first time, ratios of these components have been compared presented in Section IV. The paper is summarized in Section V. to predictions of East-West effect models above 400 km. There is good agreement in general with the anisotropy becoming apparent at approximately 1200 km (moving down) and increasing I1. MODELS OF THE EAST-WEST EFFECTrapidly starting at approximately 1000 kin, the magnitude and Protons mov...

The evolution of the / quasicontinuum spectrum with neutron number has been investigated in the sequence of isotopes ,52 < 154 > 156 £)y. The three nuclei display a pronounced collective E2 component. In l54 Dy this component shows a splitting into two distinct parts, signifying a structural change along the / cascade above the yrast line. The E2 and statistical components are reproduced in simple /-cascade calculations; in 152 Dy and 156 Dy only rotational bands are included, whereas in 154 Dy additional vibrationlike transitions are required to reproduce the two E2 peaks.