THE SPIN SEQUENCE OF THE FIRST AND SECOND EXCITED LEVELS OF Ne$sup 1$$sup 9$

Journal Article · Sat Jun 01 04:00:00 EDT 1963 · Nuclear Physics (Netherlands) Divided into Nucl. Phys. A and Nucl. Phys. B

DOI:https://doi.org/10.1016/0029-5582(63)90376-6· OSTI ID:4713588

Givens, W W; Bearse, R C; Phillips, G C; Rollefson, A A

A magnetic-lens type beta-ray spectrometer was used to measure the relative intensities of internal conversion electrons and aiso of photoelectrically converted gammarays for ground state transitions of the first- and secondexcited levels of Ne/sup 19/. These levels of Ne/sup 19/ were excited by the reaction F/sup 19/(p,n)Ne/sup 19*/. The relative intensities of the internal conversion electrons and the photoelectrons show that the internal conversion coefficient for the firstexcited to ground state transition is about an order of magnitude larger than the internal conversion coefficient for the second-excited to ground state transition. Therefore, the first-excited level of Ne/sup 19/ must have a larger total angular momentum than the second-excited level. This result confirms the interpretation given to the mean life measurements of these transitions; consequently, the reversed spin sequence of the first- and second-excited levels in the mirror nuclei Ne/sup 19/ and F/sup 19/ appears now to be well established. The level energies inferred from the photoelectron and internal conversion electron spectra are 241 plus or minus 4 and 271 plus or minus 4 kev for the first- and second-excited levels of Ne/sup 19/. (auth)

• Research Organization: Rice Univ., Houston, Tex.
• NSA Number: NSA-17-028298
• OSTI ID: 4713588
• Journal Information: Nuclear Physics (Netherlands) Divided into Nucl. Phys. A and Nucl. Phys. B, Journal Name: Nuclear Physics (Netherlands) Divided into Nucl. Phys. A and Nucl. Phys. B Vol. Vol: 43; ISSN NUPHA
• Country of Publication: Country unknown/Code not available
• Language: English

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