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Exclusive measurements of the quasi-free $np \to np\pi^0\pi^0$ reaction havebeen performed by means of $dp$ collisions at $T_d$ = 2.27 GeV using the WASAdetector setup at COSY. Total and differential cross sections have beenobtained covering the energy region $\sqrt s$ = (2.35 - 2.46) GeV, whichincludes the region of the ABC effect and its associated $d^*(2380)$ resonance.Adding the $d^*$ resonance amplitude to that for the conventional processesleads to a reasonable description of the data. The observed resonance effect inthe total cross section is in agreement with the predictions of F\"aldt andWilkin as well Albadajedo and Oset. The ABC effect, {\it i.e.} the low-massenhancement in the $\pi^0\pi^0$-invariant mass spectrum, is found to be verymodest - if present at all, which might pose a problem to some of itsinterpretations.

Measurement of the $np \to np\pi^0\pi^0$ Reaction in Search for the Recently Observed $d^*(2380)$ Resonance