Application of the collective model to determine some rotational bands of 239U nucleus

Abstract

238U material is component in fuels of nuclear reactor core. Understanding properties and structure of 238U nucleus is necessary before simulating and designing nuclear reactor. Besides that, the study of nuclear reaction is necessary to identify the specific characteristics of nucleus, it is the most effective experimental method up to now. However, in order to explain the properties of nuclear structure, in addition to study of the nuclear reaction, nuclear structure models and its theory must be used. There are many nuclear structure models to solve those properties of nucleus. This paper presents application of the Collective Model to determine some rotational bands of 239U nucleus, using Prompt gamma neutron activation analysis method (PGNAA). Experiment is performed at channel No.2 of Dalat Research Reactor (DRR), using Filtered Thermal Neutron Beam and Compton Suppression Spectroscopy with High – Purity Germanium detector (HPGe). The results have found 11 rotational bands of 239U nucleus. This work is very necessary for the research of nuclear structure which controls material technology by itself.

Lignans and some other non-alkaloid compounds from the stem bark of Zanthoxylum rhetsa and their biological activities

“…This plant distributed in India, Thai Lan, Myanmar, Lao, and Vietnam. 1,2 Z. rhetsa is an indispensable herb in Thai and Mong ethnic groups living in Northwest Vietnam, which use young leaves as a spice and fruits as the culinary soul of this region. 1–3 In folk medicine, fruit, stem, or root barks are used to treat diarrhea, malaria, rheumatism, and worms; essential oil of fruits is used as an antibacterial agent and prevention of cholera.…”

“…1,2 Z. rhetsa is an indispensable herb in Thai and Mong ethnic groups living in Northwest Vietnam, which use young leaves as a spice and fruits as the culinary soul of this region. 1–3 In folk medicine, fruit, stem, or root barks are used to treat diarrhea, malaria, rheumatism, and worms; essential oil of fruits is used as an antibacterial agent and prevention of cholera. 1 Recent studies found that Z. rhetsa contains alkaloids, lignans, coumarins, triterpenoids, 4–8 and monoterpenoids in the essential oil.…”

Inter Nuclear Energy Levels of 100Ru and 102Ru Modeling Approach

“…Hence it could be considered that nuclear quadrupole moment gives the opportunity to calculate the deviation of nuclear shape from a sphere. The mathematical development of the modeling ideas [4][5][6][7] is the basis for the collective model which has been particularly successful for A=24, 150<A<190 and A>230.…”

Particular Investigation of Energy Backbending Phenomena for Even-Even Nuclei 102Mo and 102Pd Modeling Approach

“…Hence it could be considered that nuclear quadrupole moment gives the opportunity to calculate the deviation of nuclear shape from a sphere. The mathematical development of the modeling ideas [4][5][6][7] is the basis for the collective model which has been particularly successful for A=24, 150<A<190 and A>230. The collective model could describe both the rotational states and the vibrational states, in molecular spectra, [8][9][10] one could easily see the evidences about three types of electronic excitation [11][12][13] through the electronic transitions, vibrational levels transitions and/or rotational states.…”