Experimental Cross Sections for Reactions of Heavy Ions and ²⁰⁸Pb, ²⁰⁹Bi, ²³⁸U, and ²⁴⁸Cm Targets

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 2002

DOI:https://doi.org/10.2172/799575· OSTI ID:799575

Patin, Joshua Barnes ^[1]

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1. Univ. of California, Berkeley, CA (United States); LBNL Library

The study of the reactions between heavy ions and ²⁰⁸Pb, ²⁰⁹Bi, ²³⁸U, and ²⁴⁸Cm Cm targets was performed to look at the differences between the cross sections of hot and cold fusion reactions. Experimental cross sections were compared with predictions from statistical computer codes to evaluate the effectiveness of the computer code in predicting production cross sections. Hot fusion reactions were studied with the MG system, catcher foil techniques and the Berkeley Gas-filled Separator (BGS). 3n- and 4n-exit channel production cross sections were obtained for the ²³⁸U(¹⁸O,xn)^256-xFm, ²³⁸U(²²Ne,xn)^260-xNo, and ²⁴⁸Cm(¹⁵N,xn)^263-xLr reactions and are similar to previous experimental results. The experimental cross sections were accurately modeled by the predictions of the HIVAP code using the Reisdorf and Schaedel parameters and are consistent with the existing systematics of 4n exit channel reaction products. Cold fusion reactions were examined using the BGS. The ⁴⁸Pb(²³⁸Ca,xn)^256-xNo, ²⁰⁸Pb(⁵⁰Ti,xn)^258-xRf, ²⁰⁸Pb(⁵¹V,xn)^259-xDb, ⁵⁰Bi(²³⁸Ti,xn)^259-xDb, and ²⁰⁹Bi(⁵¹V,xn)^260-xSg reactions were studied. The experimental production cross sections are in agreement with the results observed in previous experiments. It was necessary to slightly alter the Reisdorf and Schaedel parameters for use in the HIVAP code in order to more accurately model the experimental data. The cold fusion experimental results are in agreement with current 1n- and 2n-exit channel systematics.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 799575
• Report Number(s): LBNL--49593
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
74 ATOMIC AND MOLECULAR PHYSICS
BISMUTH
COLD FUSION
COMPUTER CODES
CROSS SECTIONS
CURIUM
HEAVY IONS
LEAD
PRODUCTION
TARGETS
URANIUM