Abstract
The half lives of the excited levels at 482.2 keV and 615.3 keV in181Ta have been measured by the delayed coincidence technique. In the nanosecond time range (482.2 keV level) the most serious sources of errors are jitter, walk and drift phenomena. To minimize those the time pick-off has been defined carefully by means of modern fast timing detectors and electronics. In the microsecond time range (615.3 keV level) the ratio of true delayed coincidences to chance coincidences influences considerably the final accuracy of the half-life measurements. It has been reduced as much as possible. From a series of independent measurements half lives ofT 1/2=(10.67±0.05) ns andT 1/2=(17.64±0.14) μs have been deduced for the 482.2 keV and 615.3 keV levels, respectively. The results have been compared with other values published before.
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Mouchel, D., Nylandsted-Larsen, A., Hansen, H.H.: Z. Phys. A — Atoms and Nuclei300, 85 (1981)
Nylandsted-Larsen, A., Mouchel, D., Hansen, H.H.: Z. Phys. A — Atoms and Nuclei294, 191 (1980)
Hansen, H.H., Mouchel, D., Nylandsted-Larsen, A.: Z. Phys. A — Atoms and Nuclei305, 347 (1982)
De Waard, H.: Physica18, 1151 (1952)
Sheer, C., Zinn, A., Hartmann, N.: Rev. Sci. Instrum.26, 942 (1955)
Snyder, E.S., Frankel, S.: Phys. Rev.106, 755 (1957)
Åström, B., Johansson, B., Bergström, I.: Ark. Fys.12, 205 (1957)
Bergström, I., Bonacalza, E.C.O., Jech, A., Perez, M., Thieberger, P.: Nucl. Instrum. Methods8, 151 (1960)
Manquenouille, R.: Ann. Phys. (Paris)6, 1121 (1961)
Naiman, T.D.: Phys. Rev.123, 1751 (1961)
Bozek, E., Hrynkiewicz, A.Z., Konieczny, Z., Ogaza, S., Rybicka, M., Szymczyk, S.: Physica28, 705 (1962)
Matthias, E., Boström, L., Maciel, A., Salomon, M., Lindqvist, T.: Nucl. Phys.40, 656 (1963)
Kaplan, N., Ofer, S., Zmora, H.: Nucl. Phys.52, 249 (1964)
Meiling, W., Stary, F.: Nucl. Phys.74, 113 (1965)
Sommerfeldt, R.W., Cannon, T.W., Coleman, L.W., Schecter, L.: Phys. Rev.138, B763 (1965)
Hönig, V., Löbner, K.E.G., Vetter, M.: Nucl. Phys.86, 657 (1966)
Löbner, K.E.G.: Z. Phys.216, 372 (1968)
Herr, W., Herpers, U., Hess, B.: Radiochim. Acta11, 61 (1969)
Hrastnik, B., Ljubicic, A., Vojnovic, B., Ilakovac, K., Jurcevic, M.: Fizika1, 127 (1969)
Bond, P.D., McGervey, J.D., Jha, S.: Nucl. Phys. A163, 571 (1971)
Nigam, A.K., Bhattacharya, R.: Indian J. Phys.46, 441 (1972)
Lowe, L.M., Zmora, H., Prestwich, W.V.: Can. J. Phys.51, 1497 (1973)
DeBenedetti, S., McGowan, F.K.: Phys. Rev.74, 728 (1948)
Bunyan, D.E., Lundby, A., Ward, A.H., Walker, D.: Proc. Phys. Soc. (London)61, 300 (1948)
Brown, H.N., Becker, R.A.: Phys. Rev.90, 328 (1953)
Ballini, R.: Ann. Phys. (Paris)8, 441 (1953)
Murdoch, H.S.: Proc. Phys. Soc. (London)66A 944 (1953)
Godlove, T.F., Carver, J.G.: Phys. Rev.99, 1634 (1955)
Vegors, S.H., Jr., Axel, P.: Phys. Rev.101, 1067 (1956)
Draper, J.E., Hickok, R.L.: Phys. Rev.108, 1280 (1957)
Lindström, I.E., Crasemann, B.: Rev. Sci. Instrum.30, 363 (1959)
Landaud, G.: Nucl. Instrum. Methods26, 117 (1964)
Conlon, T.W.: Nucl. Phys. A100, 545 (1967)
Favret, D., Chery, R.: Rev. Phys. Appl.4, 121 (1969)
Glatz, J.: Nucl. Instrum. Methods79, 277 (1970)
Riehs, P., Axmann, H.P., Murray, J., Thomas, B.W.: Nucl. Phys. A198, 430 (1972)
Table of Isotopes, 7th Edn. Lederer, C.M., Shirley, V.S. (eds.). New York: John Wiley and Sons 1978
Hardy, W.H., Lynn, K.G.: IEEE Trans. Nucl. Sci.23, 229 (1976)
Bedwell, M.O., Paulus, T.J.: IEEE Trans. Nucl. Sci.26, 422 (1979)
Moszynski, M., Bengtson, B.: Nucl. Instrum. Methods158, 1 (1979)
Cariolaro, G.: IEEE Trans. Inf. Theor.14, 535 (1968)
El-Ibiary, M.Y.: IEEE Trans. Nucl. Sci.27, 974 (1980)
Mouchel, D., Hansen, H.H.: Int. J. Appl. Radiat. Isot.34, 1201 (1983)
Radeloff, F., Buttler, N., Kesternich, W., Bodenstedt, E.: Nucl. Instrum. Methods47, 109 (1967)
Löbner, K.E.G.: In: The electromagnetic interaction in nuclear spectroscopy. Hamilton, W.D. (ed.), Chap. 6. Amsterdam, Oxford, New York: North-Holland Publishing Company 1975
Dumont, A.M., Camby-Val, C.: Nucl. Instrum. Methods106, 413 (1973)
Grinberg, B., Brethon, J.P., Lagoutine, F., Le Gallic, Y., Legrand, J., Wapstra, A.H., Weiss, H.M., Bambynek, W., De Roost, E., Hansen, H.H., Spernol, A.: At. Energy Rev.11, 516 (1973)
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Mouchel, D., Hansen, H.H. Half lives of the 482.2 keV and 615.3 keV levels in181Ta. Z Physik A 315, 113–117 (1984). https://doi.org/10.1007/BF01436216
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DOI: https://doi.org/10.1007/BF01436216