bm logo2020 vi

TRƯỜNG ĐẠI HỌC KHOA HỌC TỰ NHIÊN, ĐẠI HỌC QUỐC GIA THÀNH PHỐ HỒ CHÍ MINH

KHOA VẬT LÝ - VẬT LÝ KỸ THUẬT

BỘ MÔN VẬT LÝ HẠT NHÂN - NGÀNH KỸ THUẬT HẠT NHÂN - NGÀNH VẬT LÝ Y KHOA

 Phuong Truc Huynh, Trinh Pham Ngoc Tran, Binh Thanh Dinh, Linh Thi Truc Nguyen, Loan Thi Hong Truong, Anh Tuan Tran, Dung Manh Ho, Dong Van Nguyen

Journal of Radioanalytical and Nuclear Chemistry (2020) 324:663–671

Abstract:

The aim of this study was to nd trace elements that increase risk of breast cancer based on the deviation of the concentra- tion of trace elements in the ngernail collected from the women with breast cancer and the normal women. The study was conducted with 10 elements (As, Au, Br, Co, Cr, Fe, Sb, Sc, Se, and Zn) using k0-INAA and statistical analysis method. Signi cant di erences (P < 0.05) were found for Cr, Fe, Sc and Zn between the case and the control groups. A signi cant correlation between Fe and Zn has found for the normal women, but this disappears in the women with breast cancer. On the contrary, a signi cant correlation between As and Cr has found in the case group, but no such correlation has noticed for the control group. The elements Cr, Fe, and Zn may be associated to the risk of breast cancer.

More detail >>

 

 

 

Analysis of the soil to food crops transfer factor and risk assessment of multi-elements at the suburban area of Ho Chi Minh city, Vietnam using instrumental neutron activation analysis (INAA)

Bui Ngoc Thien, Vu Ngoc Ba, Mai Thanh Man, Truong Thi Hong Loan

Journal of Environmental Management 291 (2021) 112637

Abstract:

The contamination of heavy metals in agricultural ecosystem is one of the most important problems in devel- oping countries as Vietnam. In this study, we investigated the multi-element concentrations in soil, vegetables, soil-to-plant transfer factors and target hazard quotient (THQ) due to the consumption of heavy metals in Ho Chi Minh City, Vietnam. In general, the element concentrations in soil and plants were similar to different studies in the world and in the range of allowable values provided by WHO and the Ministry of Health of Vietnam. The transfer factors indicated the in uence of element characteristics and plant genotypes on the accumulation and translocation of elements from soil to plants. It is found that I. batatas, B. alba, A, tricolor, O. basilicum, and B. juncea could be potential candidates for phytoremediation in soil contaminated of heavy metals. The results of individual and total THQ were below unity for Cr, Mn, Fe, Co, Zn, As, and Sb. The total THQ is in the range from 0.11 for R. sativus to 0.84 for B. alba with the average value of 0.43, in which Mn and As are the major con- tributions to the total THQ with the average values of 75% and 18%, respectively. The safety assessment based on national regulations and THQ indicated that the consumption of investigated vegetables poses no risk to the consumers.

More detail >>

An improved semi-empirical procedure for Compton scattering technique applied to measure pipeline thickness

Vo Hoang Nguyen, Nguyen Huu Bao, Huynh Dinh Chuong, Nguyen Duy Thong, Tran Thien Thanh & Chau Van Tao 

Journal of Radioanalytical and Nuclear Chemistry (2021)

Abstract:

This study aims to formulate semi-empirical processing applied to analyze simulated and experimental scattering spectra on pipeline samples for estimating the intensity of the single scattering component for the Compton scattering technique. Firstly, a procedure has been developed based on probability density functions of each scattering component, which are obtained by GEANT4. Secondly, sixteen targets are simulated with MCNP6 to validate the proposed procedure. It is shown that the relative deviation for all samples is under 3%. Thirdly, the nine calculated thickness of pipeline samples is determined with a maximum relative deviation lower than 5% in comparing to calibration thickness.

More detail >>

AMBIGUITIES FROM NUCLEAR INTERACTIONS IN THE 12C(p,2p)11B REACTION

Nguyen Tri Toan Phuc, Kazuyuki Ogata, Nguyen Hoang Phuc, Bui Duy Linh, Vo Hong Hai and Le Xuan Chung

Communications in Physics, Vol. 32, No. 2 (2022), pp. 117-132

Abstract:

We investigate the impact of ambiguities coming from the choice of optical potentialsand nucleon-nucleon scattering cross sections on the spectroscopic factors extracted from the 12C( p,2p)11B reaction. These ambiguities are evaluated by analyzing the cross sections of the 12C( p,2p)11B reaction at 100 and 200 MeV within the framework of the distorted-wave impulseapproximation with realistic choices of nuclear inputs. The results show that the studied ambigui-ties are considerably large in this energy region and careful choices of nuclear inputs used in thereaction calculations are required to extract reliable structure information

More detail >>

Vu Ngoc Ba, Van Thang Nguyen, Bui Ngoc Thien, Huynh Nguyen Phong Thu, Truong Thi Hong Loan

Journal of Radioanalytical and Nuclear Chemistry

Abstract:

The aim of this study is to determine activity concentrations of natural radionuclides (226Ra, 232Th, 40K and 222Rn) and radiological risks due to the contamination of radionuclides in surface soil in Ho Chi Minh City, Vietnam. Based on the activity concentration of 226Ra in the surface soil, we proposed a method for estimation of the radon concentration in the indoor air. The assessments of radiation dose and excess lifetime cancer risk show that the utilization of surface soils for human residences or routine activities in the studied area poses no risk to the public health.

More detail>>

 Le Hong Khiem, Koichiro Sera, Takako Hosokawa, Le Dai Nam, Nguyen Huu Quyet, Marina Frontasyeva,  Trinh Thi Thu My, Nguyen Thi Bao My, Inga Zinicovscaia, Nguyen The Nghia, Trinh Dinh Trung, Khuat Thi Hong, Nguyen Ngoc Mai, Duong Van Thang, Nguyen An Son, Tran Thien Thanh, Sonexay Xayheungsy

 Journal of Radioanalytical and Nuclear Chemistry(2020)

Abstract:

For the rst time, the active moss biomonitoring technique has been used in Vietnam for investigation of atmospheric elemental contamination in the air of Hanoi region. The Sphagnum girgensohnii moss harvested in the clean area were used to produce the moss-bags.After 2 months of expose in 45 di erent sites in Hanoi area, the moss samples were prepared and the concentration of 27 heavy metal elements were determined by proton induced X-ray emission at Cyclotron Research Center of Iwate Medical University (Japan).The comparison of the obtained results with those in several cities in Europe shows that Hanoi’s air pollution of heavy metal is much more serious. Based on the values of contamination coe cient, it is shown that Hanoi’s air is extremely polluted by Co; seriously polluted by V and Se; moderately polluted by Cl, Cr, As, Br, Zr, Nb, Mo and Hg; slightly polluted by Mg, Al, Si, K, Ca, Ti, Fe, Cu, Zn, Ga, Rb, Sr, Mo, Ba, W and Pb Statistical analysis has been applied to the original concentration data of the detected elements to nd the possible pollution sources.

More detail >>

THÔNG BÁO KHÁC...

FaLang translation system by Faboba

BẢN TIN CHUNG

BẢN TIN GIÁO VỤ

BẢN TIN KHOA HỌC

THÔNG TIN TUYỂN DỤNG

Liên kết

 


  logo Truong KHTN 2021   physics          TTHN          VAEA     varans1          nri logo          canti1