Ç% iP c Ü R V ÄW _ Ë; c 6 ” X ¢ OSL Œ ˜ m ‘ × • ¤X N Ë; c" e P c py ¢” Ö « å ¾ ˲ o

° ‚

Ç% iP c Ü R V ÄW _ Ë; c 6 ” X ¢ OSL Œ ˜ m ‘  × • ¤X N Ë; c" e P c py ¢” Ö « å ¾ ˲  o

ƒ

‘

š„ ç ¡ * > · ý — ¡  ÷ 7 B

/ B

N Å Ò@ /† < Ɠ § Ó ü t o † < Æõ , / B N Å Ò 314-701

(2010¸   3 Z 4 29{ 9  ~ à Î6 £ §, 2010¸   6 Z 4 3{ 9  à º& ñ ‘ : r ~ à Î6 £ §, 2010¸   7 Z 4 13{ 9  > F  S X ‰& ñ )

/ B

N Å Ò@ /† < Ɠ §   H % ƒ F K y © œ Ä »% i _  — ¸A – РÒ'  Æ ÒØ  ¦ ô  Ç $ 3 % ò `  ¦  © œ“ : r  Ò'  1500

^◦

C  s _  # Œ Q “ : r • ¸\ " f

\ P

% ƒo  # Œ r « Ñ\  ¦ ï  r q Ù þ ¡ . CW-OSL (Continuous Wave Optical Stimulation Luminescence)`  ¦ s

6   x # Œ y Œ • r « Ñ   1 l x{ 9 ô  Ç z  ´+ « > › ¸| Ü ¼– Ð ì ø Í4 Ÿ ¤ 8 £ ¤& ñ # Œ z  ´+ « >  õ \  ¦ % 3 % 3  . s [ þ t X <s '   H $ 3 % ò _

 \  -t   ½ ™× ¼ (Band)_  „  • ¸@ /ü < „  • ¸@ /  s \ " f U  ·“ É r à Ôê Á œ (deep trap)õ  · û  “ É r à Ôê Á œ (shallow trap) _  4 Ÿ ¤ ¸ ú šô  Ç › ¸½ + ËÜ ¼– Ð y Œ ™• ¸ 7 £ x ÷ &  H    o\  ¦ ˜ Ð% i  . OSL 8 £ ¤& ñ \ " f y Œ ™• ¸ 7 £ x ÷ &  H s Ä »  H y n C õ

  © œ  ñ Œ •6   x   H à Ôê Á œ\  F  g ³ ðÑ þ ˜ (optical bleaching)÷ &t  · ú §  H  כ _  à Ôê Á œ ) a „    » ¡ ¤& h ÷ &  H  כ Ü ¼– Ð [ O

" î Ù þ ¡ . 7 £ ¤ …  ;…  ;y  y Œ ™™ è   H à Ôê Á œ „   _  % ò † ¾ ÓÜ ¼– Ð OSL_  y Œ ™• ¸ 7 £ x † < Ê`  ¦ ˜ Ð% i  . \ P % ƒo   ) a r « Ñ

\

 Z … ‚  `  ¦ ì ø Í4 Ÿ ¤& h Ü ¼– Ð ” ¸Ø  ¦ r v  
 OSL 8 £ ¤& ñ Ê ê y Œ ™• ¸   oÖ  ¦`  ¦ › ¸ Ù þ ¡ . ì ø Í4 Ÿ ¤8 £ ¤& ñ €   e ” _  S   Ã

º\ " f y Œ ™• ¸ Ÿ í o÷ &  H  כ `  ¦ S X ‰ “  Ù þ ¡ . “ ¦@ / ž Ðl  500

^◦

C ∼ 800

^◦

C  s \ " f ™ è$ í ÷ &% 3  €   OSL ì

ø Í4 Ÿ ¤8 £ ¤& ñ Ü ¼– Ð p t _  ™ è$ í “ : r • ¸\  ¦ & ñ | ¾ Ó o ½ + É Ã º e ”   H 0 p x$ í `  ¦ · ú ˜€ Œ ¤ .

Ù þ

˜d ” # Q: F  g  F G À Òp W 1‚  Û ¼, $ 3 % ò , À Òp W 1‚  Û ¼

Sensitivity Enhancement of the Optical Stimulation Luminescence Measured in Annealed Quartz for Repeated Cycles

Sang-Min Park · Sayong Hong ^∗

Department of Physics, Kongju National University, Gongju 314-701 (Received 29 March, 2010 : revised 3 June, 2010 : accepted 13 July, 2010)

Quartz samples were extracted from the sand of the Geum river basin near Kongju National Uni- versity and were annealed at various temperatures from room temperature to 1500

^◦

C. Continuous wave optical stimulation luminescence (CW-OSL) measurements were carried out repeatedly under the same conditions. The data showed a sensitivity enhancement due to a complex combination of deep and shallow traps between the conduction and the valance energy bands. The sensitivity enhancement could be attributed to the accumulation of trapped electrons that were not completely optically bleached during the repeated measurements. In other words, the slow decay of the trapped electrons was assumed to be the cause of the sensitivity enhancement of the OSL signal. The rate of change of the sensitivity was investigated by using a fixed beta-ray exposure and by using OSL measurements that were carried out repeatedly. The results showed that the growing OSL sensitiv- ity saturated after a number of repetition cycles, providing a possibility of quantitatively analyzing the plasticity temperature in ancient potteries if they are treated at temperature between 500

^◦

C and 800

^◦

C.

PACS numbers: 61.82.M

Keywords: OSL, Quartz, Luminescence

∗

E-mail: [email protected]; Fax: +82-41-850-8480

-752-

I. " e  ] Ø

Ä

ºo  Šҁ   ¨ 8 Š â \ " f ™  ¥ >  ” > r F    H $ 3 % ò “ É r t 8 £ x _ 

ƒ

 @ /8 £ ¤& ñ , ž Ðl  ¢ ¸  H • ¸ l _  ƒ  @ /8 £ ¤& ñ , ~ ½ Ó ‚    “ ¦_ 

~

½ Ó ‚  | ¾ Ó 8 £ ¤& ñ \  ´ ú §s  s 6   x ÷ &# Qt “ ¦ e ”   [1]. ~ ½ Ó ‚   f

 ¨ à º‚  | ¾ Ó 8 £ ¤& ñ \   6   x ÷ &  H ~ ½ ÓZ O Ü ¼– Ѝ  H é ß –{ 9  r « Ñ À Òp  W

1‚  Û ¼ 8 £ ¤& ñ Z O  (single aliquot luminescence dating tech- nique) Ü ¼– Ð F Ò q t 8 £ ¤& ñ Z O  (regeneration technique),  Ò

‚

 | ¾ Ó 8 £ ¤& ñ Z O  (additive dose technique)s  e ”   [2–5].

é

ß –{ 9  r « Ñ 8 £ ¤& ñ Z O “ É r Duller \  _ K  ™ è> h ¿ ƒ – Ü ¼ 9, s  כ

“ É

r $ 3 % ò `  ¦ s 6   x # Œ ] j4l  @& h 8 £ x \  @ /ô  Ç 1 p x ‚  | ¾ Ó`  ¦ 8 £ ¤

&

ñ   H X <  © œ ‚    ñ÷ &“ ¦ e ”   H ~ ½ ÓZ O s   [3].



ƒ    © œI _  $ 3 % ò `  ¦ Æ ÒØ  ¦ # Œ  ƒ  ~ ½ Ó ‚  | ¾ Óõ  1 l x{ 9 ô  Ç f

 ¨ à º‚  | ¾ Ó`  ¦ % 3 l  0 AK  “  / B N ~ ½ Ó ‚  `  ¦ ì ø Í4 Ÿ ¤ › ¸  # Œ 1 p x

‚  | ¾ Ó`  ¦ 8 £ ¤& ñ ô  Ç . Õ ª Q
 ì ø Í4 Ÿ ¤ 8 £ ¤& ñ `  ¦ s 6   x   H ~ ½ ÓZ O 

“ É

r ç ß –é ß – t ë ß – 8 £ ¤& ñ ½ + É M :   OSL y Œ ™• ¸    o { 9 # Q




 H é ß –& h `  ¦ ° ú “ ¦ e ”  .

y

Œ

™• ¸    o  H ~ ½ Ó ‚  | ¾ Ó\  Á º › ' a  9 é ß –t  OSL8 £ ¤& ñ ½ + É M

:    ¢ - a„  y  F  g ³ ðÑ þ ˜`  ¦ s À Òt  3 l w ô  Ç à Ôê Á œ„    t 5 Å q

&

h Ü ¼– Ð ¾ º& h H † d \     y Œ ™• ¸ 7 £ x    H ‰ & ³ © œs 
 


“

¦ e ”  “ ¦ [ O " î “ ¦ e ”   [2]. ¢ ¸ô  Ç Milman 1 p x(1998a)“ É r U



·“ É r à Ôê Á œ „   _  G ¹ ¡ § & ñ • ¸\     À Òp W 1‚  Û ¼_  y © œ• ¸

 B Ä º ´ ú §s     o\  ¦ ô  Ç   H  z  ´`  ¦ Al 2 O ₃ :C \ " f• ¸ S X ‰

“

  Ù þ ¡  [6].

$ 3

% ò õ  ° ú  “ É r Ä »„  ^ ‰\ " f  H \  -t   ½ ™× ¼  s \  e ”   H Ô

 ¦í  HÓ ü t ¢ ¸  H      † < Ê\  _ ô  Ç à Ôê Á œs  Ò q tl >  ÷ &  H X < Ä »

„

 ^ ‰_  CW-OSL — ¸4 S q“ É r  ×  æ à Ôê Á œ (multi trap)õ   ×  æ G '

p'  (multi center), „    „  s  (charge-transition) 1 p x \  _

K  4 Ÿ ¤ ¸ ú š > 
 è ß – . Õ ªA " f ç ß –é ß – >  { 9 ì ø Í o  ) a — ¸ 4

S q– Ѝ  H [ O " î l  # Q§ >  . CW-OSL\ " f # Œ Q t  t à º

†

< Êà º– Ð ×  æ^ o ?÷ &  H ‰ & ³ © œs  › ' a ¹ 1 Ï÷ & 9 s  כ \  @ /ô  Ç [ O " î `  ¦ { 9

ì ø Í or v l  0 AK  # Œ Q 7 á x À Ó_  Ä »„  ^ ‰\  @ /ô  Ç OSLz  ´+ « >

s

 ´ ú §s  à º' Ÿ ÷ &“ ¦ e ”   [7–12]. \ P % ƒo   ) a $ 3 % ò (annealed quartz) _  y Œ ™• ¸   o\  @ /ô  Ç — ¸4 S q_  ƒ  ½ ¨
š ¸“ ¦ e ” Ü ¼

 1500 ^◦ C  t  “ ¦“ : r Ü ¼– Ð \ P % ƒo   ) a  © œI _  z  ´+ « >“ É r ´ ú §s  s

À Ò# Qt t  · ú §€ Œ ¤  [13–15].



 " f Ä ºo   7 Hë  H“ É r $ 3 % ò s  \ P % ƒo   © œI \     OSL y

Œ

™• ¸ 7 £ x    H  כ `  ¦ › ' a ¹ 1 ÏÙ þ ¡“ ¦, y Œ • \ P % ƒo  r « Ñ   ì ø Í 4

Ÿ

¤ ÷ &  H OSL 8 £ ¤& ñ Ü ¼– Ð y Œ ™• ¸ 7 £ x Ö  ¦`  ¦ › ' a ¹ 1 ÏÙ þ ¡ .

II. ÷ m Ç] M öU ê s0 n É

1. V ÄW _ Ë ˜ ¼û s Ú

—

¸A – РÒ'  $ 3 % ò `  ¦ Æ ÒØ  ¦ l  0 AK  Stokes_  ~ ½ ÓZ O `  ¦ s  6

  xÙ þ ¡  [16, 17]. / B N Å Ò@ /† < Ɠ §   H % ƒ F K y © œ Ä »% i \ " f — ¸A 

\

 ¦ G 2 [ô  Ç Ê ê } Œ •  µ 1 Ï`  ¦ s 6   x # Œ ì  r  Wô  Ç + ' 10% & ñ

•

¸_  Ó ü „“ É r % i í ß –Ü ¼– Ð ò ø Íí ß –% i `  ¦ ] j Ù þ ¡ . | › ¸ Ê ê ³ ðï  r } © œ (sieve)\  ¦ s 6   x # Œ 125∼180 µm_  · ú ˜Ì q ts \  ¦ ‚  Z > Ù þ ¡ .

HF (hydrofluoric acid)`  ¦ s 6   x # Œ  © œ$ 3 `  ¦ ] j  “ ¦, Ó ü „

“ É

r % i í ß – (HCl)õ  õ í ß – oà º™ è(H 2 O ₂ ) – Ð $ 3 % ò `  ¦ ] jü @ô  Ç l  

 z Œ ™ e ” `  ¦ Á ºl Ó ü t õ  Ä »l Ó ü t _  Ô  ¦í  HÓ ü t`  ¦ ] j Ù þ ¡ .

2. S z »8 ý ° ‚ Ç% iP 

ï

 r q   ) a r « Ñ\  ¦ 12 > h– Ð ì  r 2 [ # Œ „  l – Ð (KP-SP- 1520) \  V , “ ¦ y Œ •y Œ •_  r « Ñ\     500 ^◦ C, 600 ^◦ C, 700

◦ C, 750 ^◦ C, 800 ^◦ C, 900 ^◦ C, 1000 ^◦ C, 1100 ^◦ C, 1200 ^◦ C, 1300 ^◦ C, 1400 ^◦ C, 1500 ^◦ C – Ð \ P % ƒo (annealing)Ù þ ¡ . s  M

: 5 p x“ : r 5 Å q • ¸ (heating rate)  H 2 ^◦ C/min s  . r « Ñ\  ¦ \ P 

%

ƒo  t  · ú §“ É r  © œ“ : r(30 ^◦ C) r « Ñ 1> h\  ¦ Ÿ í† < Ê # Œ — ¸¿ º 13 > h_  \ P % ƒo    É r r « Ñ\  ¦ ï  r q Ù þ ¡ . $ 3 % ò s  \ P % ƒo 

÷

&€  " f  © œ (phase)s     o   H “ : r • ¸  H 573 ^◦ C (α-quartz), 867 ^◦ C (β-quartz), 1470 ^◦ C (β-tridymite) s   [15].   

"

f y Œ • r « Ñ\  ¦ 500 ^◦ C  Ò'  1500 ^◦ C  t  12> h_  “ : r • ¸ ½ ¨ç ß – Ü

¼– Ð
¾ º# Q \ P % ƒo \  ¦ Ù þ ¡ .

3. CW-OSL • ¤X N Ë

CW-OSL 8 £ ¤& ñ `  ¦ 0 AK  Risø TL/OSL  © œq (TL/OSL- DA-15)\  ¦  6   x # Œ 160 ^◦ C \ " f  „  \ P % ƒo  “ ¦ ~ ½ Ó $ í 1

l

x 0 A" é ¶ ™ è Sr-90_  Z … ‚  Ü ¼– Ð 100œ í 1 l x î ß – 18Gy– Ð › ¸  Ù þ

¡ . LED(470 ± 20 nm)– Ð OSL ’    ñ\  ¦ µ 1 ÏÒ q tr &  F  g„  



7 £ x C  › ' a(PMT) Ü ¼– Ð À Òp W 1‚  Û ¼ (luminescence)€ ª œ`  ¦ 8 £ ¤

&

ñ Ù þ ¡ . y Œ •y Œ •_  ï  r q   ) a 13 > h_  r « Ñ\  @ /K  8 £ ¤& ñ   H ] X 

\  ¦ 1 l x{ 9  >  20 r m ”  X <s ' \  ¦ — ¸€ Œ ¤ . ½ ¨^ ‰& h “   z  ´+ « >

] X

   H  A ü < ° ú   .

(1) r « Ñ[ þ t \  Z … ‚  `  ¦ 100 œ í › ¸ (18Gy). (2) r « Ñ [

þ

t \  160 ^◦ C  t   „  \ P % ƒo (preheating). (3) r « Ñ[ þ t \  125 ^◦ C \ " f 200œ í 1 l x î ß – CW-OSL ~ ½ ÓZ O Ü ¼– Ð 8 £ ¤& ñ . (4) 0 A (1)  Ò'  (3) t  20 r CW-OSL ~ ½ ÓZ O Ü ¼– Ð ì ø Í4 Ÿ ¤8 £ ¤& ñ .

$ 3

% ò _  110 ^◦ C \ P + þ AF  g À Òp W 1‚  Û ¼ (Thermo- luminescence) _  % ò † ¾ Ó`  ¦ \ O E l  0 AK  160 ^◦ C  t 



„   \ P % ƒo  % i “ ¦, \ P \  î ß –& ñ & h “   OSL`  ¦ % 3 l  0 AK 

125 ^◦ C \ " f CW-OSL~ ½ ÓZ O Ü ¼– Ð 8 £ ¤& ñ Ù þ ¡ .

Fig. 1. CW-OSL signals for the annealed quartz samples.

III. ÷ m Ç] M ö+ s ÇÊ Ý

Figure 1“ É r y Œ • \ P % ƒo   ) a r « Ñ\  @ /K  1 r 8 £ ¤& ñ ô  Ç OSL X

<s ' s  . OSL’    ñ_  Ô  æ õ  — ¸€ ª œ`  ¦ [ O " î l  0 AK  13 > h_  r « Ñ ×  æ 30 ^◦ C, 500 ^◦ C, 600 ^◦ C, 700 ^◦ C, 750 ^◦ C, 800 ^◦ C, 900 ^◦ C, 1000 ^◦ C, 1100 ^◦ C, 1200 ^◦ C, 1300 ^◦ C, 1400 ^◦ C, 1500 ^◦ C – Ð \ P % ƒo   ) a r « Ñ\  ¦
 ? /% 3  . \ P % ƒ o

  ) a r « Ñ_  œ íl  OSL ° ú כ`  ¦ 20 œ í t  ½ ©   o (normal- ization) # Œ – ÐÕ ª (log) ß ¼l – Ð  © œ@ / q “ § Ù þ ¡ .

Smith ü < Rhodes(1994)  H OSL Ô  æ õ  / B G‚  \ " f “fast”,

“medium”, “slow” _  $ í ì  r`  ¦ ì  r À Ó # Œ [ O " î Ù þ ¡  [18].

Fig. 1 \ " f• ¸ 3> h_  OSL $ í ì  r`  ¦ S X ‰ “  ½ + É Ã º e ”  . 500

◦ C – Ð \ P % ƒo   ) a r « э  H 5 œ í t  / å L  y  y Œ ™™ è “ ¦ 700 ^◦ C

–

Ð \ P % ƒo   ) a r « э  H  © œ  Œ •“ É r “slow”$ í ì  r`  ¦ ° ú “ ¦ e ” % 3 



.  © œ“ : r (30 ^◦ C) r « Ñ_  “slow”$ í ì  r _  OSL“ É r 700 ^◦ C – Ð

\ P

% ƒo   ) a r « Ñ t  y Œ ™™ è\  ¦   1500 ^◦ C  t  \ P % ƒo   ) a r

« Ñ t  & h & h  `  ¦    H  ⠆ ¾ Ó`  ¦ ˜ Ð% i  .

0

A Fig. 1\ " fü < ° ú  s  8 £ ¤& ñ  ) a OSL X <s ' \  ¦ y Œ • r 

«

Ñ_  \ P % ƒo  & ñ • ¸\     $ 3 % ò s  α-quartz(573 ^◦ C), β- quartz(867 ^◦ C), β-tridymite(1470 ^◦ C) _   © œ(phase)Ü ¼– Ð



 ½ + É M : # Q‹ "     o e ”   H t \  ¦ Fig. 2 \ 
 Í Ç x . 30

◦ C  Ò'  1500 ^◦ C – Ð \ P % ƒo   ) a r « Ñ\  @ /K  1œ í ç ß –  Ü ¼– Ð OSL € ª œ_     o`  ¦ ì  r$ 3 Ù þ ¡ .

Figure 2  H 20  r 8 £ ¤& ñ ô  Ç X <s '  ×  æ % ƒ6 £ § 1  r 8 £ ¤& ñ ô  Ç 13 > h r « Ñ_  8 £ ¤& ñ r ç ß –   o\    É r OSL\  ¦
  · p  כ s 



. Fig. 2\   6   x ) a X <s '  ×  æ  © œ“ : r(30 ^◦ C) _  r « э  H OSL`  ¦ 8 £ ¤& ñ ½ + É M : 160 ^◦ C – Ð  „   \ P % ƒo \  ¦ # Œ z  ´] j

&

h Ü ¼– Ѝ  H 160 ^◦ C – Ð \ P % ƒo   ) a r « Ñ  ) a  . β-quartz, β- tridymite _  “ : r • ¸ # 3 0 A  H y Œ • 573 ^◦ C ∼ 867 ^◦ C, 867 ^◦ C

∼ 1470 ^◦ C s   [19]. 600 ^◦ C, 700 ^◦ C, 750 ^◦ C, 800 ^◦ C, 900 ^◦ C, 1000 ^◦ C \ " f \ P % ƒo ô  Ç r « Ñ_  OSL ß ¼l   H y Œ •y Œ • _

 8 £ ¤& ñ r ç ß –\     / å L  y  Z  }  & ’  . 1000 ^◦ C, 1100 ^◦ C

–

Ð \ P % ƒo ô  Ç ¿ º r « э  H 8 £ ¤& ñ r ç ß –\     OSLß ¼l  Ä »

Fig. 2. Time variation of OSL signals for the annealed quartz samples in the temperature range from 30 ^◦ C to 1500 ^◦ C.

Fig. 3. Results of repeated measurements on OSL sensi- tivity for the annealed quartz samples that tends to grow with time.



 “ ¦ 1200 ^◦ C, 1300 ^◦ C – Ð \ P % ƒo   ) a r « Ñ_  OSL ß ¼l 



 H 900 ^◦ C – Ð \ P % ƒo   ) a r « Ñü < Ä »  >  ± ú  & ’  . 1400

◦ C – Ð \ P % ƒo ô  Ç r « э  H z  ´+ « > ×  æ 8 £ ¤& ñ ô  Ç OSL ß ¼l  



© œ Z  } > 
 z Œ ¤ . 1500 ^◦ C – Ð \ P % ƒo   ) a r « Ñ_  OSL ß ¼ l

  H 1100 ^◦ C, 1200 ^◦ C – Ð \ P % ƒo   ) a r « Ñ_  OSL ß ¼l ü <

Ä

» ô  Ç ° ú כÜ ¼– Ð  r   Œ • & ’  . 8 £ ¤& ñ r ç ß –s  U  ´# Qf ” \   



 Ö ¼o >  Ô  æ õ    H (slow) $ í ì  r s  \ P % ƒo  “ : r • ¸ 7 £ x 

†

< Ê\    " f ° ú  s  OSL ß ¼l  & t   H  כ `  ¦ › ' a ¹ 1 ÏÙ þ ¡ .

Figure 3“ É r OSL _  y Œ ™• ¸ 8 £ ¤& ñ S   à º (cycle)\     7 £ x

 ÷ &  H  כ `  ¦
  · p  כ s  . y Œ • \ P % ƒo   ) a r « Ñ\  @ /K  1  r\  200œ í 1 l x î ß – 8 £ ¤& ñ ô  Ç OSL ß ¼l \  ¦ 20  r ì ø Í4 Ÿ ¤ 8 £ ¤& ñ 

#

Œ œ íl  ° ú כÜ ¼– Ð ½ ©   o Ù þ ¡ . y Œ • ° ú כ[ þ t“ É r 200 œ í 1 l x î ß – 8 £ ¤& ñ ô

 Ç OSL ’    ñ\  ¦ & h ì  r # Œ > í ß –Ù þ ¡ . „  ^ ‰& h Ü ¼– Ð 8 r & ñ

•

¸_  8 £ ¤& ñ  t  y Œ ™• ¸_     o  H d ”  >  { 9 # Q
 9 Õ ª Ê ê– Ð



 H Ÿ í o÷ &  H ‰ & ³ © œ`  ¦ ˜ Г   . 500 ^◦ C – Ð \ P % ƒo   ) a r « Ñ

 © œ   É r OSL y Œ ™• ¸    o\  ¦ ˜ Ð% i Ü ¼ 9 8 r s  © œ\ " f  H y

Œ

™• ¸   o Ÿ í o÷ &  H ‰ & ³ © œ`  ¦ ˜ Ð% i  . 600 ^◦ C – Ð \ P % ƒo 

 )

a r « э  H 500 ^◦ C – Ð \ P % ƒo   ) a r « ј Ð  y Œ ™• ¸   o & h 

Fig. 4. Characteristic constant showing the time varia- tion of OSL-sensitivity with the number of repeated mea- surements.

>


 z Œ ¤ .   É r \ P % ƒo   ) a r « э  H  © œ“ : r _  r « Ñü < Ä »  ô

 Ç — ¸€ ª œÜ ¼– Ð y Œ ™• ¸   o\  ¦ ˜ Ð% i  .

Huntley 1 p x(1996)“ É r  Ò‚  | ¾ ÓZ O Ü ¼– Ð  6 £ § õ  ° ú  s  † < Ê Ã

º à ºd ” `  ¦  6   x # Œ : £ ¤$ í f  ¨ à º‚  | ¾ Ó`  ¦ ½ ¨Ù þ ¡  [20].

I = I 0 (1 − exp(−D/D 0 )) (1)

I  H ì ø Í4 Ÿ ¤8 £ ¤& ñ \  @ /6 £ x   H f  ¨ à º‚  | ¾ Ó (dose) D– РÒ' _  OSL ß ¼l , I 0   H Ÿ í o÷ &% 3 `  ¦ M :_  OSL ß ¼l s  . D 0   H OSL ß ¼l  I = I 0 (1−e ⁻¹ ) s  | ¨ c M : : £ ¤$ í f  ¨ à º‚  | ¾ Ó (char- acteristic dose) s  .

Ä

ºo   H \ P % ƒo ô  Ç y Œ • r « Ñ`  ¦ ì ø Í4 Ÿ ¤ 8 £ ¤& ñ €  " f OSL y Œ ™

•

¸ 7 £ x \  ¦ ˜ Ðs   H X <s ' \  ¦ 0 A à ºd ”  (1)õ  ° ú  s  x h A (fitting) # Œ 8 £ ¤& ñ S   à º\  @ /ô  Ç : £ ¤$ í f  ¨ à º‚  | ¾ Óõ  Ä » ô  Ç OSL 8 £ ¤& ñ S   à º_  : £ ¤$ í  © œÃ º (characteristic constant of OSL cycle number)\  ¦  A ü < ° ú  “ É r d ” \ " f ½ ¨Ù þ ¡ .

L = L ₀ (1 − exp(−N/N ₀ )) (2)

#

Œl " f L“ É r ì ø Í4 Ÿ ¤8 £ ¤& ñ \  @ /6 £ x   H ì ø Í4 Ÿ ¤8 £ ¤& ñ S   à º NÜ ¼– Ð Â

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