Title: Semi-empirical formula for large pore-size estimation from the o-Ps annihilation lifetime

Authors: Nguyen Duc Thanh, Tran Quoc Dung, Luu Anh Tuyen, Khuong Thanh Tuan

Addresses: Center for Nuclear Techniques in Ho Chi Minh City (CNT), Vietnam Atomic Energy Commission, 217 Nguyen Trai, Dist. No. 1, Ho Chi Minh City, Vietnam. ' Center for Nuclear Techniques in Ho Chi Minh City (CNT), Vietnam Atomic Energy Commission, 217 Nguyen Trai, Dist. No. 1, Ho Chi Minh City, Vietnam. ' Center for Nuclear Techniques in Ho Chi Minh City (CNT), Vietnam Atomic Energy Commission, 217 Nguyen Trai, Dist. No. 1, Ho Chi Minh City, Vietnam. ' Institute for Nuclear Sciences and Technology, Vietnam Atomic Energy Commission, 5B Hoang Quoc Viet, Hanoi, Vietnam

Abstract: The o-Ps annihilation rate in large pores was investigated by the semi-classical approach. A semi-empirical model that simply correlates between the pore size and the o-Ps lifetime was proposed. The calculated results agree well with experimental data in the range from a few angstroms (A) to several tens of nanometres of the pore size.

Keywords: positron annihilation; o-Ps lifetimes; semi-empirical model; pore size; estimation; nuclear energy; nuclear power.

DOI: 10.1504/IJNEST.2008.020528

International Journal of Nuclear Energy Science and Technology, 2008 Vol.4 No.2, pp.81 - 87

Published online: 29 Sep 2008 *

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