Direct measurement of the masses of ${}^{11}{Li}$ and ${}^{26 - 32}{Na}$ with an on-line mass spectrometer

1 August 1975

journal article
research article
Published by American Physical Society (APS) in Physical Review C

Vol. 12 (2) , 644-657
https://doi.org/10.1103/physrevc.12.644

Abstract

The use of an on-line mass spectrometer to make direct mass measurements of short-lived isotopes far from the stability line has been improved to yield more accurate mass measurements for

{}^{27 - 30}{Na}

, new mass measurements for

{}^{11}{Li}

{}^{31, 32}{Na}

, and to remove a discrepancy between existing mass measurements of

{}^{26}{Na}

. The mass excesses (keV) measured are:

{}^{11}{Li}

, 40940±80;

{}^{26}{Na}

, -6901±25;

{}^{27}{Na}

, -5620±60;

{}^{28}{Na}

, -1140±80;

{}^{29}{Na}

, 2650±100;

{}^{30}{Na}

, 8370±200;

{}^{31}{Na}

, 10600±800;

{}^{32}{Na}

, 16400±1100. The

{}^{11}{Li}

value indicates that it is bound by only 170±80 keV. The masses of

{}^{31}{Na}

and

{}^{32}{Na}

imply that these nuclei are more tightly bound than expected from theoretical predictions.

Keywords

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Direct measurement of the masses ofLi11andNa26−32with an on-line mass spectrometer

Abstract

Keywords

Direct measurement of the masses of ${}^{11}{Li}$ and ${}^{26 - 32}{Na}$ with an on-line mass spectrometer