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Encouraged with the success of the matrix of energy equations in resolving alpha spectra for narrow energy band [O.A. Bondarenko, P.L. Salmon, D.L. Henshaw, A.P. Fews, Radiat. Meas. 26 (1996) 59; O.A. Bondarenko, P.L. Salmon, D.L. Henshaw, A.P. Fews, A.N. Ross, Nucl. Instrum. Methods A 369 (1996) 582] and wide energy band [E.M. Awad, A.A. Soliman, Y.S. Rammah, Phys. Lett. A 369 (5-6) (2007) 359] as well, the present work extends the applicability of this method to work out for open field studies. 241Am alpha source was used for irradiating CR-39 samples in air at normal temperature and pressure and at three different distances to obtain three different energies. Alpha particles were sorted to ten different bins according to their dip angle and the energy inside each bin was determined using alpha particle range-energy relation. Then, the energy matrix inside each bin was constructed using some selected calibration tracks. This matrix was composed of two track axes, the track minor axis (m) and diameter of etched out track end (d) of some selected elliptical tracks. The energy E in (m,d) coordinates was given by . The adjusting parameters aij were obtained by solving an over-determined system of energy equations using the SVD method. The three energies in each bin were well resolved. 相似文献
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H. El-Samman V. Barci A. Gizon J. Gizon R. Kossakowski Th. Lindblad T. Bengtsson 《Physics letters. [Part B]》1985,158(6):459-462
The effective moment of inertia Jeff(2) of 118Xe and 130Ba has been measured using sum-spectrometer techniques. The data are discussed using arguments based on particle alignments and results of cranking calculations. Jband(2) and Jeff(2) are compared in order to estimate the contribution of particle alignments to the total increase in angular momentum. 相似文献
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J. P. Martin V. Barci H. El-Samman A. Gizon J. Gizon B. Nyakó W. Klamra F. A. Beck T. Byrski J. C. Merdinger 《Zeitschrift für Physik A Hadrons and Nuclei》1987,326(3):337-338
Excited states of124Ba have been studied using the96Zr (34S,6n) reaction at 160 MeV. The yeast band is observed up to a 1π = 22+ state with a band crossing at ?w = 0.37 MeV. Negative parity levels ate also identified. 相似文献
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An amplification method for the determination of 0.5–70 ppm (2.5 × 10−6 to 3.5 × 10−4 M) of Hg(II) is described. Hg(II) is reacted with a slight excess of KI, and the excess iodide is oxidized by bromine water and measured polarographically as iodate with sixfold amplification. Alternatively, the iodate formed is reacted to liberate iodine which is then reduced to iodide, and again oxidized to yield six iodate ions for every iodide ion originally present; polarographic reduction requires 36 electrons. Oxidation of the excess iodide with periodate yields four iodate ions for every iodide ion and therefore allows 24-fold amplification.Microdetermination of mercury in organomercurials is achieved using the sixfold method following closed flask combustion: the average percentage error for 10 determinations is ±0.40 and the time required for one sample run is 45 min. 相似文献
2. Microdetermination of Mercury in Organomercurial Compounds
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