( ( The ( luminescence signal ) ) ( ( can ( be ( ( stimulated ( in ( ( the laboratory ) ( ( ( by ( heating ( -LRB- ( ( ( thermoluminescence , ) TL ) -RRB- ) ) ) ) or ) ( by exposure ) ) ) ) ) ( ( ( ( ( ( to ( intense light ) ) , ) either ) ( from ( ( the ( visible spectrum ) ) ( -LRB- ( ( ( ( optically ( stimulated luminescence ) ) , ) OSL ) -RRB- ) ) ) ) ) or ) ( from ( ( the infrared ) ( -LRB- ( ( ( ( infrared ( stimulated luminescence ) ) , ) IRSL ) -RRB- ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ luminescence) (NN signal)) (VP (MD can) (VP (VB be) (VP (VBN stimulated) (PP (IN in) (NP (NP (DT the) (NN laboratory)) (PP (PP (IN by) (NP (NP (NN heating)) (PRN (-LRB- -LRB-) (NP (NN thermoluminescence)) (, ,) (NP (NNP TL)) (-RRB- -RRB-)))) (CC or) (PP (IN by) (NP (NN exposure)))))) (PP (PP (TO to) (NP (JJ intense) (NN light))) (, ,) (CC either) (PP (IN from) (NP (NP (DT the) (ADJP (JJ visible)) (NN spectrum)) (PRN (-LRB- -LRB-) (NP (JJ optically) (JJ stimulated) (NN luminescence)) (, ,) (NP (NNP OSL)) (-RRB- -RRB-)))) (CC or) (PP (IN from) (NP (NP (DT the) (NN infrared)) (PRN (-LRB- -LRB-) (NP (JJ infrared) (JJ stimulated) (NN luminescence)) (, ,) (NP (NNP IRSL)) (-RRB- -RRB-)))))))) (. .)))
The luminescence signal can be stimulated in the laboratory by heating (thermoluminescence, TL) or by exposure to intense light, either from the visible spectrum (optically stimulated luminescence, OSL) or from the infrared (infrared stimulated luminescence, IRSL).
(ROOT (S (NP (NP (NNP Producing) (NN light)) (PP (IN without) (NP (NN heat)))) (VP (VBZ is) (VP (VBN called) (S (ADJP (JJ luminescence))))) (. .)))