Recombination lifetimes of LiF:Mg,Cu,P for pulsed optically stimulated luminescence

TY - JOUR

T1 - Recombination lifetimes of LiF:Mg,Cu,P for pulsed optically stimulated luminescence

AU - Nyemann, Jacob Søgaard

AU - Balling, Peter

AU - Yukihara, Eduardo G.

PY - 2021/6

Y1 - 2021/6

N2 - The well-known thermoluminescent material LiF:Mg,Cu,P (MCP) was previously shown to emit significant optically stimulated luminescence (OSL). In this paper, we investigate the rate of OSL recombination processes in MCP, expressed as effective lifetimes, using time-correlated single photon counting, in this context often referred to as time-resolved pulsed OSL. The recombination luminescence fell into two categories: (i) a dominant fast decaying luminescence described by the two lifetimes τ 1=22.8(1.7)μs and τ 2=60(5)μs and (ii) a slowly decaying part with indeterminate decay profile at a comparatively low signal level (we denote this as “offset luminescence”). The fast recombination channels corresponding to τ 1 and τ 2 are responsible for 71% of the total luminescence observed during test measurements. The luminescence associated with τ 1 dominate the beginning of an experiment, but is depleted much quicker than the luminescence associated with τ 2. We show that all recombination channels show similar response to preheating of the sample, which suggests that they are associated with the same trapping centers.

AB - The well-known thermoluminescent material LiF:Mg,Cu,P (MCP) was previously shown to emit significant optically stimulated luminescence (OSL). In this paper, we investigate the rate of OSL recombination processes in MCP, expressed as effective lifetimes, using time-correlated single photon counting, in this context often referred to as time-resolved pulsed OSL. The recombination luminescence fell into two categories: (i) a dominant fast decaying luminescence described by the two lifetimes τ 1=22.8(1.7)μs and τ 2=60(5)μs and (ii) a slowly decaying part with indeterminate decay profile at a comparatively low signal level (we denote this as “offset luminescence”). The fast recombination channels corresponding to τ 1 and τ 2 are responsible for 71% of the total luminescence observed during test measurements. The luminescence associated with τ 1 dominate the beginning of an experiment, but is depleted much quicker than the luminescence associated with τ 2. We show that all recombination channels show similar response to preheating of the sample, which suggests that they are associated with the same trapping centers.

KW - LiF:Mg,Cu,P

KW - Lifetime

KW - Luminescence

KW - OSL

KW - Recombination

KW - Time-resolved

UR - http://www.scopus.com/inward/record.url?scp=85101379887&partnerID=8YFLogxK

U2 - 10.1016/j.jlumin.2021.117924

DO - 10.1016/j.jlumin.2021.117924

M3 - Journal article

SN - 0022-2313

VL - 234

JO - Journal of Luminescence

JF - Journal of Luminescence

M1 - 117924

ER -