Table 1.

Comparison of the performance of CdTe Compton camera and other gamma-ray polarimeters.

Detector	Reference	Energy ($E_{\gamma }$)	Reaction	Polarization sensitivity (Q)	Figure of merit (F)
CdTe Compton camera	This work	847	$_{}^{56}$Fe$(p,p^{\prime }\gamma )$	0.35	$2.4\times {10}^{-6}$
CdTe (Single layer, Fine pitch)	Antier et al.30	200–300	Syncrotron radiation	0.78$_{}^a$	–
CdTe (Two layers)	Moita et al.31	278	Syncrotron radiation	0.13$_{}^a$	–
POLALI	Werth et al.15	847	$_{}^{56}\text{Fe}(p,p^{\prime }\gamma )$	0.32	$4.0\times {10}^{-6}$
MINIPOLA	Werth et al.15	847	$_{}^{56}\text{Fe}(p,p^{\prime }\gamma )$	0.07	$2.0\times {10}^{-7}$
Gammasphere	Schmid et al.21	847	$_{}^{56}\text{Fe}(p,p^{\prime }\gamma )$	0.047	–
Clover Ge	Kojima et al.24	847	–	0.229$_{}^b$	–
GRETINA	Morse et al.29	847	–	0.200$_{}^c$	–
DAGATA	Alikhani et al.27	1173	$_{}^{60}$Co	0.228	–
Clover Ge	Kojima et al.24	1173	$_{}^{60}$Co	0.181	$4.7\times {10}^{-7}$
DAGATA	Alikhani et al.27	1332	$_{}^{60}$Co	0.192	–
Clover Ge	Kojima et al.24	1332	$_{}^{60}$Co	0.197	$5.5\times {10}^{-7}$
POLALI	Werth et al.15	1368	$_{}^{24}\text{Mg}(p,p^{\prime }\gamma )$	0.30	$1.8\times {10}^{-6}$
MINIPOLA	Werth et al.15	1368	$_{}^{24}\text{Mg}(p,p^{\prime }\gamma )$	0.05	$2.0\times {10}^{-8}$
Gammasphere	Schmid et al.21	1368	$_{}^{24}\text{Mg}(p,p^{\prime }\gamma )$	0.043	$1.7\times {10}^{-6}$
GRETINA	Morse et al.29	1368	$_{}^{24}\text{Mg}(p,p^{\prime }\gamma )$	0.196	$2.0\times {10}^{-3}$

[a] estimated as a modulation factor.

[b] interpolated by ($a=3.25\times {10}^{-4}$, $b=0.131$)²⁹.

[c] interpolated by ($a=1.470\times {10}^{-4}$, $b=0.3404$: setup II)²⁴.