IOSR-JAP   Volume-9 ~ Issue-1 ~ Jan-Feb 2017

ABSTRACT: The correlations between the multiplicity distributions and the projectile fragments, as well as the correlation between the black and grey fragments were given. We observed that the mean number of interacting projectile nucleons increases quickly as the value of heavily ionizing charged particles increase as expected but attains a more or less constant value for extreme central collisions. Finally, there is no distinct correlation between the shower particle production and the target excitation, but the average value of grey particles decreases with the increase of the number of black particles and vice versa. This correlation can also be explained by the fireball model.

Keywords: Correlations between the multiplicity distributions, Total disintegrations.

[1]. OyniecGInt. J. Mod. Phys. A17 3107 (2002).
[2]. GlauberR G In Lectures of Theoretical Physics, (Eds) WE Britin, Dunham LG PhD dissertation Interscience, NewYourk 1: 315 (1959).
[3]. Mu Y GPhys. Lett.83 3617 (1997).
[4]. Beavis D S, Fung S Y, Gom W, Keano D, Y M Liu Y M, Poe R T, Van Dalen G and Vient MPhys.Rev. Lett.54 1652 (1979).
[5]. Beckmann P, Gustafasson H A, and Gutbrod H H, Kalmpert K H, Kolb B, Loehren H, Posanzer A M, Ritter H G,Shmidt H R, and Siemiarcz T CK, Mod. Phys.Lett.A2. 163- 168 (1987).

ABSTRACT: The enhancement of sub-barrier fusion has been interpreted due to coupling between the relative motion and other degrees of freedom. The coupling gives rise to the distribution of fusion barriers and passage over the lowest barrier which is responsible for fusion enhancement at energies below the barrier. There are several orders of magnitude could be considered due to the tunneling through the barrier. The barrier height could be deduced from the measured cross section data for different energies, as well as using many empirical forms for incomplete and complete fusion of two massive nuclei.............

Keywords: fusion barrier, ODEFF function , excitation, nuclear potential, WKB approximation

[1]. L C Vaz, et al, Phys. Rep., 69, 373, 1981
[2]. L C Vaz and J. M. Alexander, Phys. Rev. ,C 18 ,2152, 1978
[3]. R Bass , Nucl.Phys. ,A231 ,45, 1974
[4]. H J Krappe, et al , Phys .Rev. , C 20, 992, 1979
[5]. H Esbensen et al., Phys. Rev. , C 40 ,2046, 1989

ABSTRACT: The presence of Ra in drinking water may sometimes make important contribution to natural background radiation exposures. The paper describes the study of 226Ra and 228Ra content in drinking water of Luxor, a famous tourist city in Egypt. A total of thirty-five water samples were analyzed for 226Ra and 228Ra by gamma ray spectrometry with HPGe detector setup, coaxial type and 8192 channels MCA. The concentration of 226Ra was found in the range from 16 to 181 with arithmetic mean 85.6 mBq·L-1and the concentration of 228Ra ranged from 8 to 98.4 mBq·L-1 with arithmetic mean 48.6 mBq·L-1.The.............

Keywords: Ra, 228Ra, drinking water, radioactivity, effective doses.

[1]. F. Korkmaz Gorur ,H. Camgoz .Natural radioactivity in various water samples and radiation dose estimations in Bolu province, Turkey. Chemosphere , Volume 112, , Pages 134-140, October 2014
[2]. IAEA 1990 International Atomic Energy Agency, The environmental behavior of radium V.1, echnical Reports Series. No. 310, IAEA, Vienna (1990).
[3]. K. A. Aleissa., M. S. Islam . An approach to determination of 226Ra and 228Ra in the ground water and its impact on the population dose. Atomic Energy Research Institute, King Abdulaziz City for Science & Technology, Saudi Arabia. IRPA 11, Session 2, Radiological Protection System and Regulation Madrid, 2004.
[4]. United Nations Scientific Committee on the Effects of Atomic Radiation, Sources, effects and risks of ionizing radiation, UNSCEAR (2000).
[5]. Violeta Pintilie, Vntoaneta Ene, lucian p. Georgescu, luminita moraru, Catalina Iticescu Measurements of gross alpha and beta activity in drinking water from galati region, romania. Romanian reports in physics, vol. 68, no. 3, p. 1208–1220, 2016.

ABSTRACT: A new ultra-low-background spectrometer based on a HPGe detector with a sensitive volume of 600 cm3 was developed to investigate rare nuclear processes, such as resonant neutrino-less double electron capture (0νEC/EC) and double beta decay processes (2ν2β–, 2νβ+EC, 2νEC/EC) to the excited states of daughter nuclei. The spectrometer was installed at the Modane underground laboratory (LSM, France, 4800 m w.e.). Sensitivity of the spectrometer and its background were tested. A new method for the efficiency calibration in measurements of low-active samples was developed...........

Keywords: double beta decay, gamma-ray spectrometry, HPGE detector.

[1]. W. C. Haxton and G. S. Stephenson, "Jr. Double beta decay," Prog.Part.Nucl.Phys, vol. 12, pp. 409 -479, 1984.

[2]. V. I. Tretyak and Y. G. Zdesenko, "At. Data and Nucl. Data Tables," vol. 80, p. 83, 2002.

[3]. A. S. Barabash and al., "Two neutrino double-beta decay of 100Mo to the first excited 0+ state in 100Ru," Phys. Lett., B, vol. 345, pp. 408-413, 1995.

[4]. P. Loaiza and al., "Low background germanium planar detector for gamma-ray spectrometry," NIM A, vol. 634, p. 64, 2011.

[5]. G. Heusser, M. Laubenstein and H. Neder, "Radioactivity in the environment, International Conf. on Isotopes in Environmental Studies, Aquatic forum 2004, 25.-29. october 2004," in Radionuclides in the Environment, Amstedram, Elsevier, 2006, p. 495.