| Autor: |
Münzenberg, G., Armbruster, P., Hofmann, S., Heßberger, F., Folger, H., Keller, J., Ninov, V., Poppensieker, K., Quint, A., Reisdorf, W., Schmidt, K., Schneider, J., Schött, H., Sümmerer, K., Zychor, I., Leino, M., Ackermann, D., Gollerthan, U., Hanelt, E., Morawek, W. |
| Zdroj: |
Zeitschrift für Physik; 1989, Vol. 333 Issue 2, p163-175, 13p |
| Abstrakt: |
We identified two α-emitting isotopes of element 107 with masses of 261 and 262 respectively by parent-daughter correlations. For the isotope with mass 262 we found two transitions with (102±26) ms and (8.0±2.1) ms half-life, which we assign to the groundstate and to an isomeric transition, respectively. The half-life of the isotope with mass 261 is (11.8) ms. Spontaneous fission, which could be assigned to the decay of an isotope of element 107, was not detected in our experiments. This observation is in-line with our previous results, indicating a region of nuclei with strong microscopic stabilisation in the trans-actinides. Both new isotopes were produced by complete fusion ofBi withCr. The production cross sections are (163±34) pb for107 and (36) pb for107. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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