Advanced SearchSearch Tips
The development of conductive 10B thin film for neutron monitoring
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
The development of conductive 10B thin film for neutron monitoring
Lim, Chang Hwy; Kim, Jongyul; Lee, Suhyun; Jung, Yongju; Choi, Young-Hyun; Baek, Cheol-Ha; Moon, Myung-Kook;
  PDF(new window)
In the field of neutron detections, gas, the so-called "the gold standard," is the most widely used material for neutron detections because of its high efficiency in neutron capturing. However, from variable causes since early 2009, is being depleted, which has maintained an upward pressure on its cost. For this reason, the demands for replacements are rising sharply. Research into neutron converting materials, which has not been used well due to a neutron detection efficiency lower than the efficiency of , although it can be chosen for use in a neutron detector, has been highlighted again. , which is one of the replacements, such as , , , , is being researched by various detector development groups owing to a number of advantages such as easy gamma-ray discrimination, non-toxicity, low cost, etc. One of the possible techniques for the detection is an indirect neutron detection method measuring secondary radiation generated by interactions between neutrons and . Because of the mean free path of alpha particle from interactions that are very short in a solid material, the thickness of should be thin. Therefore, to increase the neutron detection efficiency, it is important to make a thin film. In this study, we fabricated a thin film that is about 60 um in thickness for neutron detection using well-known technology for the manufacturing of a thin electrode for use in lithium ion batteries. In addition, by performing simple physical tests on the conductivity, dispersion, adhesion, and flexibility, we confirmed that the physical characteristics of the fabricated thin film are good. Using the fabricated thin film, we made a proportional counter for neutron monitoring and measured the neutron pulse height spectrum at a neutron facility at KAERI. Furthermore, we calculated using the Monte Carlo simulation the change of neutron detection efficiency according to the number of thin film layers. In conclusion, we suggest a fabrication method of a thin film using the technology used in making a thin electrode of lithium ion batteries and made the thin film for neutron detection using suggested method.
thin film;Neutron;Proportional counter;MCNP6;
 Cited by
Reilly D, Ensslin N, Smith H Jr, et al. Passive nondestructive assay of nuclear materials. U.S. Nuclear Regulatory Commission, NUREG/CR-5550. 1991.

Kouzes RT, Ely JR, Lintereur AT, et al. Neutron detector gamma insensitivity criteria. Pacific Northwest National Laboratory PNNL-18903. 2009.

Knoll GF. Slow neutron detection methods. In: Radiation detection and measurement. 3th ed. New York; Wiley & Sons. 2000:505-535.

Person TM, Aloise G. Neutron detectors-alternatives to using helium-3. GAO-11-753. Report to Congressional Requesters. Washington. 2011.

Shea DA, Morgan D. The Helium-3 shortage: supply, demand, and options for congress. CRSR41419. Congressional Research Service. Washington. 2010.

D. Kramer. DOE begins rationing helium3. Phys. Today. 2010;63(22):22-25.

Milbrath BD, Peurrung AJ, Bliss M, et al. Radiation detector materials: An overview. J. Mater. Res. 2008;23(10):2561-2581. crossref(new window)

Kouzes RT, Ely JH, Erikson LE, et al. Neutron detection alternatives to $^3He$ for national security applications. Nucl. Instum. Meth. A. 2010;623:1035-1045. crossref(new window)

Brooks FD. A Scintillation counter with neutron and gamma-ray discriminators. Nucl. Instrum. Meth., 1959;4:151-163. crossref(new window)

Zaitseva N, Rupert BL, PaweLczak I, et al. Plastic scintillators with efficient neutron/gamma pulse shape discrimination. Nucl. Instum. Meth. A. 2012;668: 88-93. crossref(new window)

Knitel MJ, Dorenbos P, Haas JTM de, et al. $LiBaF_3$, a thermal neutron scintillator with optimal n-$\gamma$ discrimination. Nucl. Instrum. Meth. A. 1996;374:197-201. crossref(new window)

Wang Z, Morris CL. Multi-layer boron thin-film detectors for neutrons. Nucl. Instum. Meth. A. 2011;642:323-325.

Pasquier A Du, Warren PC, Culver D, et al. Plastic PVDF-HFP electrolyte laminates prepared by a phase-inversion process. Solid State Ionics. 2000;135:249-257. crossref(new window)